Features: 1. **4G Wireless Landline Phone:** Supports GSM850/900/1800/1900Mhz, caller ID, stores over 100 SMS messages, 7-level adjustable headset volume and mute, stores 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** talk time and **150 hours** standby time. (depending on network environment) 3. **Multifunctional Phone:** It's not just a calling tool, but also features an alarm clock and FM radio. 4. **Perfect for Seniors:** Large buttons and clear font are ideal for seniors. 5. **External Antenna:** The external antenna makes the received signal more stable, eliminating disconnection issues and ensuring clear, uninterrupted communication during 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 Switching Power: AC: 100-240V; DC: 5.00V, 0.65A Display: 128 x 64 dot matrix LCD Package Weight: 700 g/26.5 oz Package Size: 27 x 19 x 5.5 /10.6 x 7.5 x 2.2 inches Package Contents: 1 x Phone Base 1 x Handset 1 x Phone Line 1 x Battery 1 x User Manual