Features: 1. 4G Wireless Landline Phone - Supports GSM850/900/1800/1900Mhz, caller ID, saves more than 100 SMS on the phone, 7-level adjustable headset volume and mute, storage of 20 missed or received calls and the ten most recently dialed numbers. More functions are described in the user manual. 2. Powerful Battery - Built-in 3000mAh NiMH battery provides up to 2.5 hours of talk time and 150 hours of standby. (depending on the network environment) 3. Multifunctional Phone - It is not only a tool for making calls, but also an alarm clock and FM radio function. 4. Perfect for Seniors - With large buttons and clear font, it is suitable for the elderly. 5. External Antenna - The external antenna makes the received signal more stable, eliminates disconnection problems, and ensures clear and free communication in every call. Specification: Model: F317 Color: black, white (optional) Network support: GSM Dimensions: 196x152x51mm Battery: 3.7V 3000mAh GSM frequency: 850/900/1800/1900 MHz Power adapter: AC: 100-240V; DC: 5.00V, 0.65A Display: 128 x 64 dot matrix LCD. Package weight: 700g/26.5oz Package size: 27 x 19 x 5.5 /10.6 x 7.5 x 2.2 inches Packing list: 1 x phone transmitter 1 x handset 1 x phone line 1 x battery 1 x User Manual Our after-sales team consists of experienced, professional and responsible staff. They will do their best to solve your problems and let you feel our sincerity and care. Buying our products means choosing security and peace of mind.