Features: 4G Fixed Wireless Phone - Supports GSM850 /900 /1800 /1900Mhz, caller ID, save more than 100 SMS on the phone, 7-level headphone volume and mute adjustable, store 20 missed calls or received calls and the last ten dialed numbers. 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 network environment). Multifunctional Phone - It is not only a tool for calling, but an alarm clock and has FM radio function. Perfect for Elderly People - With large buttons and the font is clear and age-friendly. External Antenna - External antenna makes the signal received more stable, get rid of the problem of disconnection, ensure every call sound quality is clear, unimpeded 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 Power Supply: AC:100-240 V; DC:5.00 V,0.65 A Display:128X64 dot matrix LCD screen. Package Weight: 700g /26.5oz Package Size: 27 x 19 x 5.5 /10.6 x 7.5 x 2.2in Packing List: 1 x Phone Transmitter 1 x Phone Receiver 1 x Phone Line 1 x Battery 1 x User Manual