When the battery is depleted, it will start charging 3 minutes lat Charger Standard: ±5.0V 300-500mA, please use the standard charger to avoid the host damage. Please make sure the device is installed under an environment with strong GSM signal. Weak signal or lack of signal will lead to bad effect or out of work. Once you can't get connect to the device please re-install the SIM card or try again after battery full charging. If the device can't answer the call automatically, please re-install the SIM card. Packing List: 1 * Main Unit N9 1 * USB Cable 1 * User Manual OPP bag packaging