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 silence, storage of 20 missed or received calls and the last ten dialed numbers. More features 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 the elderly - 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 unobstructed communication in every call. Specification: Model: F317 Color: Black, White (Optional) Network Support: GSM< /li> Dimensions: 196x152x51mm Battery: 3.7V 3000mAh GSM Frequency: 850/900/1800/1900 MHz Power Switch: 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 Telephone Transmitter 1 x Telephone Handset 1 x Telephone Line 1 x Battery 1 x User Manual