Sunu band Quick Start

Sunu band Quick Start Guide


Thank you for choosing Sunu. This quick start guide will help you become familiar with the Sunu band and its basic operation. The quick start guide will show you the following:

  1. What’s included in the box.
  2. Charging your Sunu band.
  3. Wearing the Sunu band.
  4. The Sunu band Interface.
  5. Interface Operation.

Included in the Box

The following is included within the Sunu band box:

  • One Sunu band Sonar bracelet.
  • One micro USB to USB cable.
  • A welcome insert with inspirational quote.

Getting to Know Sunu band

Sunu band is the first smart mobility aid that improves mobility for the visually impaired. Sunu band combines a sonar or echolocation sensor with a high resolution vibrating actuator to gently inform the user about objects or obstacles up to 15 feet (5 meters) away. Sunu band augments awareness of the user’s personal space and reduces accidents, ultimately providing a more confident and enjoyable mobility experience. On top of that Sunu band comes with additional and upgradable functions thanks to its integration with the Sunu App:

  • Haptic watch: discretely tell time with vibratory pulses
  • Vibratory alarms: set up alarms from the App with different vibratory patterns on the band.
  • Obstacle detection: The sonar sensor enables you to perceive objects or obstacles that are within your environment.
  • Unlimited firmware updates: keep your band updated with the latests optimizations to the core functions of the Sunu band

Parts of the Sunu Band

It is important that you familiarize yourself with the different parts of the Sunu band. The image below shows the parts of the Sunu band as viewed from its side, top and bottom


image showing the parts of the Sunu band

A: The sonar sensor is a round metal cylinder embedded on the Sunu band. The sensor is a transducer that emits ultrasounds as well as detects the echo or reflected sound-waves that bounce back from objects or obstacles that are within the selected range

B. Sunu band has two (2) buttons located on one side of the device. The buttons allow the user to interact with the Sunu band interface. The HOME button is closest to the sonar sensor and has rough texture on its surface. The App-Menu button is furthest away from the sonar sensor and has a smooth texture on its surface.

C: The flat top surface of the Sunu band has a touch-pad. The touch pad allows users to interact with the interface.

D: The micro-USB inlet is located underneath the Sunu Band (opposite side to where the sonar is located).

E: That Sunu band comes with a standard 20mm hypoallergenic silicon strap (black) and silver buckle.

Charging the Sunu band

You should re-charge Sunu band when you first receive it. Sunu band’s rechargeable battery lasts up to 12 hours with average use. To extend the battery life of your Sunu band we recommend that you recharge it for 3-4 hours. Sunu band will reach full charge within 3-4 hours. To re-charge the Sunu band:

  1. Connect the corresponding end of the micro-USB cable to the micro-USB inlet that is located underneath the Sunu band.
  2. Connect the USB end of the cable to any USB power adaptor.
  3. Allow 3-4 hours to reach full charge.

Image showing how to connect the micro-USB cable to the micro-USB inlet on the Sunu band



Wearing the Sunu band

You can wear Sunu band on either hand, just like any watch. It is important to wear Sunu band with the sonar sensor on the same side as your thumb, as shown in the image below. Then adjust the belt and buckle until the Sunu band fits comfortably and securely around your wrist. We recommend that you wear Sunu band on the opposite hand to which you handle other travel aids such as a white cane or guide dog.

Diagram illustration of how to wear the Sunu Band


The Sunu band Interface

Sunu band’s interface works similarly to a smartphone or tablet.  Sunu band has:

  • Two buttons located at one of the sides of the Sunu Band.
  • The touch-pad, which is the flat top surface of the device.

The Buttons:

image showing the buttons on the Sunu band


  1. The HOME button is closest to the sonar and has a rough texture.
  2. the APP/MENU button is furthest from the sonar and feels smooth.

The two ways in which we interact with the buttons are:

  • Press: Push and immediately release the button.
  • Press and hold: Push button and maintain pressed for 3 seconds before releasing.

The touch-pad

You interact with the touch pad just like you would with any smartphone or tablet surface. The two primary kinds of interactions you will be doing with the touch pad are:

I. Swipe Interactions:

  • Swipe-Out: Slide finger in the direction that is going away from the sonar sensor.
  • Swipe-In: Slide finger in the direction towards the sonar sensor.



II. Touch Interactions

  • Tap and hold: Place your finger on the touch-pad, hold for 3 seconds, and release.
  • Double-Tap: Touch twice on the touch-pad with your finger.



Interface Operation


Sunu band’s HOME button is the equivalent of the lock screen button on a smartphone. It basically exits from any active app and goes into a standby or low power mode, which we will refer to as the HOME. Sunu band’s HOME allows you to use the Haptic Watch by swiping on the touch pad. The haptic watch enables you to read the time via a series of vibration patterns.

When you press the HOME button, you will immediately feel a soft long pulse to indicate that Sunu band is now in the HOME mode. Sunu band will go into sleep mode after the first minute has passed.

Sunu band Apps

Apps on the Sunu band allow you to access certain features or perform specific functions. Application on the Sunu band are managed from the Sunu mobile app for iOS and Android (coming soon). Sunu band come with three apps:

  1. Haptic Watch (access from within HOME).
  2. Vibratory Alarms (managed from within the mobile app).
  3. Obstacle Detection.

You can turn ON/OFF, customize and manage specific apps or functions on the Sunu band from within our mobile app for iOS and Android. please refer to our mobile app quick start guide for details.

Haptic Watch

Sunu band’s haptic watch allows you to know the time via a series of short or long pulses. You may choose to read the hour or the minutes depending on how you swipe on the touch pad. To access the haptic watch:

  1. Press the HOME button. you will immediately feel a soft short pulse to indicate that you are now in the HOME mode. The haptic watch will be available for one minute before the band goes to sleep. If Sunu band is in sleep mode, simply press the Home button again to begin using the haptic watch.
  2. Begin reading the time by: Swipe-In to read the hour and/or Swipe-Out to read the minutes. A vibratory pattern will follow indicating the hour or minutes.

Reading the Time

To tell the time, Sunu band uses a very simple numeric system similar to roman numbers or the abacus, where a long pulse equals 5 and a short pulse equals 1. We then add the number of short and long pulses that we feel to calculate the time.

image, sunu band reads the time via a series of short and long pulses.


I. Reading the hour:

Swipe-In on the touch-pad to read the hour. You will immediately feel a series of pulses. For every:

  • Short pulse: add +1 hour to the time.
  • Long pulse: add +5 hours to the time.

II. Reading the Minutes:

Swipe-Out on the touch-pad to read the minutes. The minutes information is provided in two parts separated by a long pause:

  1. Sunu band tells the Tens-past or how many 10’s of minutes have passed the hour, (10, 20, 30, 40, 50 minutes). If there are no vibrations, it means that the time is either exactly on the hour or less than 10 minutes have passed the hour.
  2. Sunu band tells the ones-passed or how many minutes passed the hour. If there are no vibrations, it means that zero minutes have passed like in the case when the time is exactly on the hour or at exactly a multiple of ten-passed.

We add up these two values of tens- and ones-passed to get the total minutes. Here is how we do it:

1. Tens-past, (10’s) of minutes passed the hour. For every:

  • Short pulse: add +10 minutes to the time.
  • Long pulse: add +50 minutes to the time.
  • No vibration: indicates that the time is either exactly on the hour, or less that 10 minutes have passed the hour.

2. Ones-passed, for every:

  • Short pulse: add +1 minute to the time.
  • Long pulse: add +5 minute to the time.
  • No vibration: means that zero (0) minutes have passed like in the case when the time is exactly on the hour or at exactly a multiple of ten-passed.

Adjusting Time Preferences

Sunu band derives the time from your iOS phone when the device is paired with the mobile app.

Obstacle Detection App

The Obstacle Detection app activates the Sunu band’s sonar sensor which detects objects or obstacles that are within your environment up to 15ft (5 meters) away. Sunu band detects objects in ‘real time’. Sunu Band provides haptic vibration feedback that informs the user about their proximity to an object. Here is how the sonar or echolocation sensor work:

The sonar transducer emits a high-frequency sound wave that bounces back from an object(s) that are within range of the sonar. The resulting sound waves or echos that bound back are detected and processed to obtain information about the object’s proximity. This information is converted into vibratory patterns or pulses that you feel on your wrist. Generally, the vibration pulses become more frequent as an object is close or less frequent as the object is farther away.

Our mobility guide will introduce you to the principals of echolocation, and you will practice detecting objects with the Sunu band. 

The Obstacle Detection app allows you to:

  • Activate the sonar sensor and vibration feedback.
  • Switch between sonar modes.

Activating the Obstacle Detection App

  1. Press APP/MENU button to activate the sonar. When you press the button, Sunu band will immediately vibrate to indicate that the app is now active.
  2. After a brief pause, you will feel one or two pulses to indicate the sonar mode.
  3. After another short pause the Obstacle Detection App will be active and working in the selected mode. You can aim the sensor in different directions or pass your hand in front of it to make sure that it is working properly.

Switching Between Sonar Modes

The Sunu band has two sonar operating modes:

  1. Short range (indoor) mode: allows you to detect obstacles within 4-5ft or 1.5 meter range and has low sensitivity. This mode is ideal for navigating indoors and crowded spaces. it’s low sensitivity allows for gaps, doorways and thresholds to be readily detected.
  2. Long range (outdoor) mode: allows you to detect obstacles within 16 ft or 5.5 meters. and has high sensitivity. This mode is ideal for navigating outdoors and wide open spaces. It’s high sensitivity is optimized to detect thin objects like tree branches and bushes.

Swiping In or Out on the touch pad switches between sonar modes.

  1. Swipe-In to switch to the short range mode. You will immediately feel 1 pulse to indicate thar this mode is on.
  2. Swipe-Out to switch to the long range mode. You will immediately feel 2 pulses to indicate that this mode is on.

Exiting the Sonar & Obstacle Detection app

  • Press the HOME button to exit and return to HOME.

Gestures Control

Gestures are simple movements of the hand that allow you to control certain functions of the Sunu band. Sunu band’s sensors tracks the position and movement of your hand to trigger, for example, an instant sleep or rapid ON/OFF of the Sunu band. Gesture are intended to help in situations where you may have your hands occupied holding your personal articles, and pressing a button is a bit cumbersome.

Your Sunu band comes with two active gesture controls that enable you to quickly SLEEP and WAKE-UP the Obstacle Detection App. This is especially useful when you are traveling and a situation arises where you don’t need the Sunu band’s Obstacle Detection App providing feedback. Gestures allow you to quickly send the band to sleep and wake-up. Here is how we do it.

Obstacle Detection SLEEP and WAKE-UP

This gesture only work when you are in any of the sonar modes of the Obstacle Detection App. You should perform the gesture with the hand that you wear the Sunu band. To send Sunu band to SLEEP:

  1. Tap twice on your hip. With your palm facing toward your hip, or tap the ‘buckle side’ of the Sunu band against your hip twice.
  2. You will feel a long pulse. This pulse begins with a strong intensity and ramps down to a soft intensity. It indicates that the Obstacle Detection mode is asleep.

To WAKE-UP the Sunu band:

  1. Tap twice on your hip. With your palm facing toward your hip, or tap the ‘buckle side’ of the Sunu band against your hip twice.
  2. The Sunu band will pulse to indicate the sonar mode that is in use.

There is another way to quickly SLEEP and WAKE-UP your Sunu band. You can do this by:

  1. Bringing your arm up to chest level.
  2. Turn your wrist until it is level, and your palm is facing down.
  3. The Obstacle Detection App will quickly SLEEP when your hand is only in this position.


  1. Return your arm to your side.
  2. The Obstacle Detection app will quickly Wake-up.
  3. Sunu band will continue working in the same sonar mode that was selected prior to sleep.


Resetting Sunu band

Sunu band can be reset to its factory defaults. To reset Sunu band:

  1. Press and hold the App/Menu button for 3 seconds, unit Sunu band begins to vibrate.
  2. Allow Sunu band to go through the reset process. This should only take about 10 seconds.
  3. Once the Sunu band is no long vibrating, it is now ready for use.

What’s Next?

We recommend that you now review the Sunu mobile app quick start guide to learn how to pair and connect your Sunu band to the Sunu App. The mobile app allows you to unlock Sunu band’s potential. With the mobile app, you will be able to customize your Sunu band and manage its apps or functions directly from your phone.

Have Questions?

Be sure to visit us at for the latest guides and learning content. If you have any questions about our tutorials or need additional assistance, please contact us at hello<at>sunu<dot>io.

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