* Call back function
* GSM frequency ranges: 850/900/1800/1900
* GPRS: Upload60,TCP/IP
* Working voltage: 3.4—4.2V DC
* Standby current: ≈2.5mA
* Start sound-controlling current: ≈30mA
* Speaking current: ≈150mA
* GSM positioning time: 35s
* Working ambient temperature: -20¡æ¡«+70¡æ
* Working ambient humidity: 20%¡«80% RH
* Dimensions: 41 (L) × 23 (W) × 14.5(H) mm |