Standard Compliances GSM900/1800MHz General Specifications Operation Temperature: -10℃ ~ 50℃ Storage Temperature: 30℃ ~ 70℃ Operation Humidity: 5% ~ 95% Charger AC Input: 90 ~ 240 VAC, 50~60Hz Charger DC Output: 5 V DC Battery Capacity: 800mAh Li-Ion Standby Time: 96hrs Continuous Talk Time:2 hrs Phone Dimensions: 129x45x21mm Base Dimensions: 87x85x75mm Weight: < 1.0kg Antenna: Internal Display: 128x64 Dot-matrix Display Back Light: Yellow Green Keypad Back Light: Blue Data Interface: USB Color: Black Language: Chinese, English Features Call Waiting,Forwarding, 3-Way Calling Caller ID Voice Mail SDK 200 Contacts + Contacts in UIM (if used) 200 SMS + SMS in UIM (if used) Call History Calendar, Schedule, Alarm Clock Screen Saver with Date/Time Display Speed-Dialing Speakerphone Polyphonic Ring Tones Selectable Features AC Plug Type for Charger FM2 Radio is optional Languages: English, Spanish, Chinese, Arabic, Others can provided as required Headset is optional