Round smartwatch. Get connected, learn the essentials and find help when you need it.
01 · FIRST USE
Connect your ET491.
Companion app: G Band. This is the name in the supplied guide. Use the app linked in the instructions supplied with your device. Check its current App Store or Google Play requirements before installing. If the app or menu differs, contact us before switching apps.
Charge the watch with its supplied magnetic cable before first use. Press and hold the side button to turn it on.
Enable Bluetooth on your phone. Open G Band, go to Devices, select Connect, then select the Bluetooth name of your watch. Accept the pairing request.
After the connection is established, the watch syncs the phone’s date and time. For calls, also accept the Bluetooth audio pairing request. If audio disconnects, use Devices → Bluetooth Call and the watch’s Call Settings to reconnect.
Charging & everyday care
Align the supplied cable’s contacts with the contacts on the back of the watch; connect the USB end to a 5V USB power source.
Keep the watch and contacts dry before charging. Do not charge if water remains on the device.
Wipe the device regularly, especially the skin-contact area. If you develop irritation, remove it and stop wearing it.
02 · EVERYDAY FUNCTIONS
Make sense of your records.
Once connected, use the app to review the activity, heart-rate and sleep records supported by your device. Sleep records require wearing the device during sleep. Available settings depend on your device and app version.
Health readings are for general wellness reference, not medical diagnosis, treatment or prevention. Do not change medication based on these readings.
Record an ECG · manual operation
Wear the watch so the back electrodes make full contact with your wrist. Open the ECG recording screen on the watch.
Rest your arm, stay still and lightly touch the side electrode with a finger of your other hand. Tap Start Measurement if shown. Keep contact until the recording finishes.
Open the companion app to review the saved recording. If your device does not show the described ECG control, contact support with its model and app version.
Use this only on a compatible device with the ECG electrodes and controls described in its supplied instructions. This is an on-demand recording, not a diagnosis or continuous ECG service.
Watch the app recording flow
This original screen recording shows an app demonstration session. It does not show the physical electrode position, confirm support on every model or establish medical accuracy. Other menus visible in the recording may not be available on your device.
See real app examples
Original English app screens from a demonstration session. The readings belong to that session; these images do not confirm every menu or measurement for your device.
Activity recordsHeart-rate recordsSleep records
03 · TROUBLESHOOTING
Try these checks first.
The app cannot find my device
Make sure Bluetooth is enabled, the device is powered on and charged, and your phone is nearby. Check that the device is not already connected to another phone. Reopen the app and try its device-connection screen again. If it still cannot connect, contact support with your model and app version.
Records or time are not syncing
Open the companion app and check the device connection. Keep the app allowed to run in the background as needed, then reconnect. Do not assume that a record visible in a demonstration is supported by your particular model.
The app is connected, but calls do not work
Check the separate Bluetooth audio pairing and the call connection on the watch. Keep your phone connected and allow the permissions needed for calls. App data connection alone does not establish call audio.
Notifications are missing
Check the phone’s Bluetooth connection and the app’s notification permissions. Enable only the notifications you want. Phone settings and background restrictions can affect delivery.
The device does not charge or switch on
Check the supplied cable, USB power source and contact alignment. Make sure the contacts are clean and dry. If charging still does not start, stop using a damaged cable or device and contact support.
A reading looks unexpected
Check fit and sensor contact, keep still during a manual recording and review the instructions for your model. Readings are for general wellness reference. Do not use them for diagnosis, treatment or medication decisions; seek medical advice about health concerns.
04 · YOUR MANUAL
The right guide for your device.
Need a copy of your manual? Tell support your model and preferred language so we can send the matching guide.
Contact MARSYU with your model name, a short description of the issue and your order reference if relevant. A photo of the device and its model label can help. Please do not send passwords, full payment details or unneeded health readings.
