ARF37 User GuideRef. 07-10-V3-psn p 15Procedure1. In the main screen, press OK for 2 seconds until appearson the screen. The keypad buttons are no longer available for useexcept the On/Off button.2. To unlock the keypad press OK for 2 seconds until thedisappears.NOTEThe keypad is automatically locked when you switch on the device.Reloading the BatteryYou can reload the batteries before they are unloaded.The batteries are reloaded in 3 to 4 hours.Their autonomy is 8 to 16 hours.C AUTIONWhen stored unused, the batteries keep discharging due to a small currentconsumption in OFF mode. Remove the battery from the device when youstop using it and check the battery level before re-using once again theproduct.