1. Features: 1. 4G wireless phone - Supports GSM850/900/1800/1900Mhz, number display, stores over 100 SMS on the phone, 7-level adjustable headset volume and mute, saves 20 missed or received calls and the ten most recently 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 time (depending on network environment) 3. Multifunctional phone - It's not just a tool for calling, but also an alarm clock and FM radio function 4. Perfect for seniors - With large buttons and clear font, it's suitable for seniors 5. External antenna - The external antenna makes the received signal more stable, eliminating issues with disconnection and ensuring clear communication in every call Specifications: Model: F317 Color: Black, white (optional) Network support: GSM 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 Packaging list: 1 x phone transmitter 1 x phone receiver 1 x phone cord 1 x battery 1 x user manual