Sim Card Wireless Gsm Hands-free Wired Radiophone Home

Specifications: Operating frequency : GSM 800/900/1800/1900 MHz Working Temperature : 0 ~ 55 degree Relative humidity : 5 % to 95% Adapter input voltage: AC 50Hz, 220V +10% Backup battery: Ni-MH battery , 1000 mAh Standby time : 48-72 hours , dependon network status may be ( battery power ) Talk time: 2-6 hours, depend on the network status may be ( battery power ) Charging time: for the first time more than 12 hours, after 6 hours Language: multi-lingual Detailed introduction of main functions: The function supports GSM frequency 850 / 900 / 1800 / 1900 MHz Speed dial / redial / handsfree call Alarm clock function / phone book function Screen green backlight and 7-level brightness adjustment Ring selection and volume adjustment of multiple calls Multiple SMS ringtones and mute function Send and receive SMS in Chinese, English