Bisofice Cordless Phone Desktop Telephone Set with GSM Support and Dual SIM Cards for Home and Office Use

7 levels of brightness adjustment - Depending on ambient light, you can adjust display font brightness to ensure clear content display.. 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. Multinational system language - Chinese, English, French, Spanish, Portuguese 5 languages provide you to choose, you can set up language you need. A telephone brings more functions. In addition to regular functions, there are radio, alarm clock functions. Multi-function phone - It can speed dial, record 50 groups of call records for your convenience and other regular functions. Fixed Wireless Phone - Our Desk Phone support dual SIM cards and several GSM frequency including 850/900/1800/1900MHZ and 2G network as well