About Marsyu

01 · FIRST USE

Connect your GE50.

Companion app: H 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. Press and hold the side button to power it on.
Enable Bluetooth on your phone. In H Band, open Me → Devices and select the watch. Grant the permissions required for the features you choose to use.
If the call audio is not connected automatically, open your phone’s Bluetooth settings and pair the watch’s audio connection. Keep the app and phone connected for supported functions.

Charging & everyday care

Attach the magnetic cable to the watch’s charging contacts and connect the USB end to a USB power source.
Keep the watch clean and dry before charging. Avoid heat, strong magnetic fields and impacts.
Wear the band comfortably rather than too tightly, and keep the skin-contact area clean.

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.

For an ECG setup question, contact support with your GE50 version and a photo of its feature screen so we can provide matching steps.

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 records: actual English app demonstration — Activity records

Heart-rate records: actual English app demonstration — Heart-rate records

Sleep records: actual English app demonstration — Sleep 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.

Request your manual

05 · HERE TO HELP

Still need a hand?

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.

Contact MARSYU

rhoddudley4@gmail.com