Color LED;Device status;Do it
Blinks blue;No connection;This means that the phone does not support connectivity. Turn on&turn off Bluetooth on the phone, turn on&turn off device. If it not help you need to update the phone's operating system to Android 8.0 and iOS 13.0 and above, make sure the phone supports BLE (Bluetooth Low Energy) or use another phone.
Blinks red;The battery is low;This means that the battery is discharged and you need to fully charge the device with a tested cable (the recommended full charge time is 2 hours, when charging, use a tested cable). You can see charge status in app: Settings->my device->charge.
Constantly red;Error;Fully charge the device with a working cable (within 2 hours, blinks yellow during charging), turn the device on / off.
Blinks red 3 times and then turn off;The battery is completely discharge;Fully charge the device with a working cable (within 2 hours, blinks yellow during charging), turn the device on / off.