... 1MHz to 6.5GHz for all RF frequency include GSM , WIFI, Bluetooth, FM, VHF, UHF, 900/1200/2400 wireless audio and video ... transmission frequency. 3.Built in super bright red LED ... detect fuction. 7.Adjustable lens detector mode, with different flashing frequency. 8.Built in 500mA rechargeable LIION battery, operating time up ...