... short circuit protectPowerful lens detector ,for all CCD and CMOS camera,with pin hole or convert type,all will easy to find ... .Adjustable RF signal strength detect function.Adjustable lens detector mode, with different flashing frequency.Built in 500mA rechargeable LIION battery, operation ... LED indicator of RF signal will be become brighter. cctv Camera Lens Hidden Wireless Camera Detector/ Finder