Features:Fixed Wireless Phone - Our Desk Phone support dual SIM cards and several GSM frequency including 850/900/1800/1900MHZ and 2G network as well.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.Multinational system language - Chinese, English, French, Spanish, Portuguese 5 languages provide you to choose, you can set up the language you need.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.7 levels of brightness adjustment - Depending on the ambient light, you can adjust the display font brightness to ensure clear content display.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.Specifications:Type: ETS-6588Shell Color: BlackShell Material: PlasticGSM Frequency: 850/900/1800/1900MHZBattery: 3.7V 1000mAh Li-ion Battery LCD Backlight Function: SupportItem Size: 25 * 20 * 6.8cm / 9.8 * 7.9 * 2.7inPackage Size: 25 * 20 * 7cm / 9.8 * 7.9 * 2.8inPackage Weight:650g / 22.9ozPackage List:1 * Cordless Phone1 * Charging Cable1 * Coil Cord1 * Built-in Li-ion Battery 1 * User Guide(English)