Main technical parametersResolution: 296×128Voltage: 3VPower supply: CR2450-2 button altilium, standby tempore 250 daysScreen size: 2.9 inchesScreen type: E-ink electronic ink screenDisplay color: 3 colorum rubei, white and blackSize: 85×41mmShell color: white/blackCommunication method: BluetoothBluetooth version: Bluetooth 5.0Support operating system: Android Notice: JavaScript requiritur ad hoc contentus.