product title em660 dimensions: target:51mm×30mm×5mm weight <30g external interface compliant to pci-sig pci express mini card version 1.2(support usb 2.0 protocol) technical standard cdma 2000 1xrtt； compatible to cdma is-95 a/b 800/1900mhz； cdma 2000 1x evdo rev.0 800/1900 mhz； cdma 2000 1x evdo rev.a 800/1900 mhz； operating frequency cdma/evdo 800m rx:869mhz～894mhz/tx:824mhz～849mhz cdma/evdo 1900m rx:1930mhz～1990mhz/tx:1850mhz～1910mhz data rate evdo rev.a data service of up to dl 3.1 mbps/ul 1.8mbps max. transmitter power cdma 800 mhz :+23 dbm（power class 3）; cdma 1900 mhz +23 dbm（power class 2）; maximum power consumption average power consumption <= 3.6w power supply 3.3v/1100ma at command sets support 3gpp 27007 at commands, and some huawei defined commands. ruim support ruim,standard 6 pin uim card interface,support 3v and 1.8v uim card receive diversity 800/1900mhz receive diversity antenna inte