Features: 4G Fixed Wireless Phone - Support GSM850/900/1800/1900Mhz, Caller ID, Save more than 100 SMS on the phone, 7-level earphone volume and silence adjustable, Storage 20 missed calls or received calls and the last ten numbers dialed. More features are 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 network environment) Multifunctional Phone - It is not only a tool for making calls, but also an alarm clock and has FM radio function. Perfect for the elderly - With a large button and the font is clear and age-friendly. External Antenna - External antenna makes the signal reception more stable, get rid of the problem of disconnection, ensure the sound quality of each call is clear, unobstructed communication. Specification: 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:100-24; DC:5.00 V,0.65 A Display:128X64 dots LCD screen. Package Weight: 700g/26.5oz Package Size: 27 x 19 x 5.5/10.6 x 7.5 x 2.2in Package List: 1 x Phone Transmitter 1 x Phone Receiver 1 x Phone Line 1 x Battery 1 x User Manual< br> Color Black