Features: ☎ 4G Fixed Wireless Phone - Supports GSM 850/900/1800/1900 MHz, Caller ID, stores over 100 SMS messages, 7-level headphone volume and mute adjustment, stores 20 missed or received calls and the last ten dialed numbers. Additional functions are detailed 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 conditions. ☎ Multifunctional Telephone - Includes calling functionality, alarm clock, and FM radio. ☎ Designed for Senior Users - Features large buttons and clear, easy-to-read display text. ☎ External Antenna - Enhances signal reception for stable connectivity, reduces call drops, and ensures clear audio quality for uninterrupted communication. Specification: Model: F317 Color: Black, White (Optional) Network Support: GSM Dimensions: 196 x 152 x 51 mm Battery: 3.7V 3000mAh GSM Frequency: 850/900/1800/1900 MHz Power Adapter: AC 100-240 V; DC 5.00 V, 0.65 A Display: 128 x 64 dot matrix LCD screen Package Weight: 700 g / 26.5 oz Package Dimensions: 27 x 19 x 5.5 cm / 10.6 x 7.5 x 2.2 in Package Contents: 1 x Telephone Transmitter 1 x Telephone Receiver 1 x Telephone Line 1 x Battery 1 x User Manual