Features: 4G fixed wireless phone - supports GSM850/900/1800/1900Mhz, caller ID, stores over 100 text messages, 7-level headset volume and mute adjustable, saves 20 missed or received calls along with the last ten dialed numbers. More functions are detailed in the user manual. Powerful Battery - Equipped with a 3000mAh NiMH battery, providing up to 2.5 hours of talk time and 150 hours of standby time (varies by network environment). Multifunction phone - serves not only as a calling tool but also features an alarm clock and FM radio functions. Ideal for seniors - designed with large buttons and clear fonts for easy use. External antenna - enhances signal reception stability, eliminating disconnection issues, ensuring clear sound quality during calls and seamless communication. 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