Description Size smaller than SIM908. 5-18V power supply supported. The USB port can be very handy. Compatible USB TTL series for 2.85V, 3.3V and 5v GSM, GPRS, GPS {text messaging, data transmission, positioning} triple function signals. Quad band communications available worldwide. , AT command operation, supports SMS, telephone, GPRS data, GPS data is automatically transmitted, the integrated TCP protocol supports transparent mode and command mode, supports HTTP protocol to support the DTMF decoding, supports MMS, supports recording function, etc. IPX antenna connector Plate size 54 * 43 mm. Sending is by card only, without antennas or other accessories. Tray size 54 * 43 mm.