Features: 4G fixed wireless phone - support GSM850/900/1800/1900Mhz, caller ID, save more than 100 text messages on the phone, 7-level headset volume and mute adjustable, store 20 missed or received calls and the last ten number to dial. More functions will be described in the user manual. Powerful Battery - Built-in 3000mAh NiMH battery provides up to 2.5 hours of talk time and 150 hours of standby time. (depending on the network environment) Multifunction phone - it is not just a calling tool, but an alarm clock and FM radio function. Great for seniors - with large buttons, clear fonts and suitable for seniors. External antenna - The external antenna makes the signal reception more stable, gets rid of the trouble of disconnection, and ensures that the sound quality of each call is clear and the communication is unimpeded. Specifications: Model: F317 Color: Black, White (optional) Network Support: GSM Size: 196 x 152 x 51mm Battery: 3.7V 3000mAh GSM Frequency: 850/900/1800/1900MHZ Switching Power Supply: AC: 100-240 V; DC: 5.00 V, 0.65 A Display: 128X64 dot matrix LCD. Package Weight: 700g/26.5oz Package Dimensions: 27 x 19 x 5.5cm/10.6 x 7.5 x 2.2in Package Contents: 1 x Phone Transmitter 1 x Phone Receiver 1 x Phone Cord 1 x Battery 1 x User Manual