Specification: 1. Using American Qualcomm 5100 MCU ; 2. Small and exquisite shape and metal carapace; 3. rotatable Antenna and Push-Push UIM ; 4. Supporting Voice calling , group message; 5. Communication Recorded, Telephone Book ; 6. It can support at most 230.4kbps downlink communication rate; 7. Mine USB interface. Main technical parameter Power supply: 5V ; Dimensions:58mm X 43MM X 13.3MM ; Weight:31g ; Interface type: Mini USB supports the operating system: Win2000, XP,Vista ; transfer rate : 230.4Kbps ; Frequency: Transmitting 824MHz-849MHz; receiving 869MHz-894MHz ; acceptor sensitivity: -104dBm ; stores temperature: -40 degrees Centigrade to 80 degrees Centigrade ; Working temperature: -30 degrees Centigrade to 60 degrees Centigrade ;