Dual Sim Card GSM Fwpcordless Telephone With 2 Sim Card

Working frequency range: GSM 850/900/1800/1900MHz or GSM 900/1800MHz 2) Power Supply: AC 220V plus/minus 15% 3) Channel space:200KHz 4) Max power: 0.25W / 0.5W 5) Consumptiona) Immobility: less than 25mAb) Transmission: less than 400mA 6) Receiving sensitivity: -104dB 7) Surrounding temperature: -10 degree - +40 degree 8) Relative humidity: 10% - 95% 9) Atmosphere pressure: 86- 106Kpa 10) Environment noise: <60dB