... pinhole wireless products. 2.Detectable RF frequency from 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 ... fuction. 7.Adjustable lens detector mode, with different flashing frequency. 8.Built in 500mA rechargeable LIION battery, operating time ...