Features: Fixed Wireless Phone - Support dual SIM cards and several GSM frequency, caller ID, save more than 100 SMS on the phone, 7-level headphone volume and silence adjustable, storage 20 missed call or received calls and the last 10 dialed number. 9 speed dial keys and redial function, support three-way conference call and so on. Wireless hone - Our Desk Phone support dual SIM cards and TF card, and several GSM frequency including 850/900/1800/1900MHZ. Powerful battery - Built-in 1000mAh Li-ion battery provides up to 4hrs of talk time and 3 days standby time.(depending on network environment) 10 System Languages Support - Chinese, English, French, Spanish, Portuguese, Russian, German, Burmese, Italian, Arabic, you can set up the language you need. 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: Model: F602 Size: 20 x 16 x 5cm Battery: 3.7V 1000mAh GSM Frequency: 850/900/1800/1900MHZ Package Weight: 750g/24.7oz Package Size: 27 x 19 x 5.5cm/10.6 x 7.5 x 2.2in Packing List: 1 x Telephone 1 x Cord of Telephone 1 x Power Adapter 1 x Battery 1 x User Manual