Feature: 1. Fixed Wireless Phone: Our Desk Phone support dual SIM cards and several GSM frequency including 850/900/1800/1900MHZ and 2G network as well. 2. Multi Function Phone: It can speed dial, record 50 groups of call records for your convenience and other regular functions. In addition to the regular functions, there are radio, alarm clock functions. A telephone brings more functions. 3. Multinational System Language: Chinese, English, French, Spanish, Portuguese 5 languages provide you to choose, you can set up the language you need. 4. Powerful Battery: Built in 1000mAh li ion battery provides up to 5 days of battery life without having to worry about suddenly running out of power. 5. 7 Levels of Brightness Adjustment: Depending on the ambient light, you can adjust the display font brightness to ensure clear content display. 6. External Antenna: External antenna makes the signal receive more stable, get rid of the trouble of disconnection, ensure every call sound quality clear, unimpeded communication. Specification: Item Type: Cordless Phone Material: Plastic Type: ETS 6588 Shell Color: Black Shell Material: Plastic GSM Frequency: 850/900/1800/1900MHZ Battery: 3.7V 1000mAh Li ion Battery LCD Backlight Function: Support Item Size: Approx. 25 x 20 x 6.7cm / 9.8 x 7.9 x 2.6in. Package List: 1 x Cordless Phone1 x Charging Cable1 x Coil Cord1 x Built in Li ion Battery 1 x User Guide(English)