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8.5. CHARGING
The RG540 supports 5V/2A charging, Only use valid RugGear licensed chargers and cables
because unlicensed products may cause the battery to explode or damage the device.
The device must only be charged in an ambient temperature range of +0°C to +45°C. The
normal operating temperature of this mobile phone is -10°C to 50°C.
The RG540 provides charging contacts on the rear side to charge the device via the
Desktop Charger (optional accessory). The Desktop Charger also provides a second
charging slot for spare batteries (optional accessory).
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9. FUNCTION INTRODUCTION
9.1 PTT/ customize keys:
Your phone supports custom buttons, so you can use them to use quick applications. The
main function of the custom button is to quickly open the application you specify. PTT in
the list means: Long press the custom key to enable software talkback.
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