TDK GSM Telephone Dual SIM KT900+ GSM Desk Phone SIM supported: Dual SIM Type: Analog Cordless Phone Network type: GSM 900-1800MHz 1500mAh NiMH batteries, 3.6 V Place of Origin: China Supports call waiting, hold Three calls supplement Supports a second dialing Adjustable volume Size: 21.5 x 17 x 6.8cm Weight: Below 1.0Kg Standby time: 72 hours Time: 5 hours