Type: WCDMA & GSM Port Number: 2 Working Frequency: WCDMA & GSM Color: Black, White, Greys (Optinal) Caller ID Display: Yes WCDMA (3G): 900/850/1900/2100 MHz GSM: 850/900/18001900 MHz Reversal polarity: Support Dialtone frequency: 450 MHz Antenna: Magnetic Antenna with 3 m Cable Warranty: 1 year Back up battery: Supports Show More