Dual Sim Card Based GSM Landline Telephone with FM Radio- ittelic

product description  GSM desktop phone is a good choice for office and home use with clear and loud voice strong signal and backup it is the best for remote rural areasit is easy to use and Corporate convenient for the old and kids  features  GSM 900 mhz/1800 mhz or 850 /900/ 1800 /1900 mhz WCDMA: 900 /2100 mhz  Support high quality voice speech encoding  Support emergency call redial speed dial  call forwarding call waiting call hold three Party call Supplementary Services  2 way sms Voicemail and caller ID large phone book store 300 pieces telephone numbers phone memory and SIM card dtmf dialling adjustable ring and voice volume ringtone selection LCD display 128 into 64 Dot LCD display backlight function backlight LCD with datetime signal strengthen volume status icons can save check delete and callback incong outgoing and ssed calls TNC antenna or non detachable antenna rechargeable li-ion backup sim card interface the Standard 6 pin sim card interface a variety of specifications for selection lock card lock National Call Lock Phone default IP function GPRS Internet data service support CSD and GPRS class 10 allocate connect PC by port software upgrade Jack support multi language  Technical spec:   1. Normal operation temperature: -30 ---70     Restricted operation temperature: -30 ---80     Storage temperature: -40 ---85   2. Environment noise: Below 60dB(A)   3. SIM Card: 1.8V/ 3V   4. Channel interval: 200 KHz   5. Receive sensitivity: <-100dBm   6. Relative hudity: 45%~95%   7. Atmosphere pressure: 86~106Kpa   9. Power supply: 220V plus/nus 15%, Freq.: 50Hz   10. GPRS multi-slot class 10/8 GPRS mobile station class B   11. Compliant to GSM phase 2/2+         -Class 4()         -Class 1()   12. Control via AT commands   (GSM 07.07, 07.05 and SIMCOM enhanced AT Commands)   13. AC power: DC 5V 1000mAH   14.: US, UK, Australia and European standards.   15.Dimensions (L x W x H) (average): 220 x 200 x 60mm  16.Weight: FWP: 650g; Full set with AC adapter, antenna and box: 750g  17.Colors: Black/White  18. : 3, 6V 1000mAH Li- ion  rechargeable  (accessory)    standby time: up to 168H     Applications:  1) For public use   2) For office and home use   3) For rural and mountainous areas   4) For mobile carriages, like ships, automobiles and trains   5) For those places where hardwire-line telephone service is unavailable   Pictures:  English keyboards and other language keyboards are available.  Packing list:  gsm desktop phone  Power adaptor  Antenna  Back up   User manual  Data  line