... WM9713 audio output, support for two output, two-way entry. And support the TOUCH function. Phone support ... , USB HOST interfaces; 2, USB Device Interface 3 way 232, 3-way TTL serial port; 4,100 M network interface ... interface 8, RTC rechargeable battery; 9,5 V power input 10,10 keys, the layout of the phone ... LCD optional.Packing included 5 V/2A switching power supply miniUSB line cross-line of a serial ...