Dialing: 1) Send the signal automatically after 4 seconds when pick up the telephone mike and do not dial number 2) Connect the IP network when dialing long distance automatically 3) Preset local area code Voice: 1) Reminder the incoming call and outgoing call number by vivid sound 2) 16 chord vivid rings and singing 3) Calling volume adjustable Screen: 1) Incoming number display/blue backlight/Chinese menu 2) Automatically save the detail information for last 32 dialed/received phone numbers, and missed calls, 50 VIP number (add or delete, edit location, save, call return) 3) Displaying battery level and signal strength/date/week/time Other function: 1) Avoid disturb 2) Calling restriction: domestic and international call 3) Specialized SIM card in case of avoiding misuse in mobile phones 4) Intelligent power management, detecting the batteries to recharge or discharge automatically Specifications: 1) Operation temperature: -10癈 ~ +50癈 2) Working humidity: 30% ~ 90% 3) Air pressure: 86KPa~106KPa 4) Receive/send frequency range: GSM900/1,800 5) Operation power supply: AC 220V/50Hz 6) Operation pressure: AC 100V ~ 265V 7) Maximum output rate: 33.0dBm?dBm 8) Receive sensitivity: class II RBER: 2% (-102dBm) 9) Maximum frequency error: ?.1ppm 10) RMS phasic error: 5? 11) Stand by hours of the battery: above 36 hours 12) Talking time of the battery: 2-6 hours (depending on the network)