Features: 1) Original Nokia 6150 / 5110 LCD and motherboard 2) Multi-language selectable (English / Spanish / French) 3) Support SMS and voice function 4) Phonebook and call records 5) Easy to install and easy to maintain 6) Built-in back-up Li-ion battery: 48 hours standby / 3 hours talk 7) Other Nokia mobile phone functions available 8) Clear voice and no noise 9) Caller ID 10 received / 10 dialed / 10 missed records 10) Multiple chord ringer / alarm choice 11) Authentic signal, battery volume, time display 12) Strong signal by high gain antenna (3.5dB - 5dB) 13) IP pre-setting for save call cost 14) Wide-range voltage and low power consumption 15) SIM card locked (optional) 16) Like ordinary hardwire-line telephone operation method Specifications: 1) Air interface standard: GSM 900 / 1,800MHz Phase 2+ 2) Frequency ranges: a) GSM 900: i) Transmission: 890 ~ 915MHz ii) Reception: 935 ~ 960MHz b) GSM 1800: i) Transmission: 1,710 ~ 1,785MHz ii) Reception: 1,805 ~ 1,880MHz 3) Channel space: 200kHz 4) Max power: 0.25W / 0.5W 5) Consumption: a) Immobility: ≤25mA b) Transmission: ≤400mA 6) Sensitivity: -105dB 7) Surrounding temperature: -10°C ~ +40°C 8) Relative humidity: 45% ~ 90% (without frost) 9) Atmosphere pressure: 86 ~ 106KPa 10) Environment noise: 11) Antenna amplifying: 3.5dB (omni directional), 12dB (certain direction / chosen direction) 12) AC power: DC7.5V - 20V 13) Connector of power: China 14) Dimensions (L x W x H) (average): 230 x 180 x 60mm 15) Weight: a) FWP: 600g b) Full set with AC adapter, antenna and box: 750g 16) Colors: black / grey (optional) 17) Antenna connection: SMA antenna connection Applications: 1) For public use as payphones 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