... which enables the machine to cut off the external power supply can work 3 to 5 seconds, ... sensor accelerometer sensor, optional features • Support for 3G wireless transmission function, the various 3G standards, WCDMA, CDMA2000, TD-SCDMA ....or ... 10M/100MAutomatically adapt to network interfaceWireless Transmission Support built-in 3G wireless transmission capabilities, WCDMA, EVDO, HSPA, TD-CDMA .... ...