A counter-surveillance device designed to readily locate any wireless hidden camera Operates within a range of 152 metres 500 feet 2.5-inch TFT hi-res LCD screen shows the image of a nearby camera so that you see what the watcher sees 1.25-inch LCM display shows battery level receiver sensitivity alarm audio onoff and frequency during scanning Frequency range to be scanned 900MHz2.7GHz Lightweight portable operated by 4 x AA 1.5V batteries 35 hours or the included 5V power supply The scanner can find wireless cameras in NTSC PAL colour or BW Can be used as a portable receiver for any wireless camera you have Technical specificationsFrequency range covered900MHz - 2700MHzScanning modeautomanualcontinuousContinuous scan30 sec. power saving scanning60 sec. power saving scanning30 sec. power saving pre-set frequency scanning60 sec. power saving pre-set frequency scanningReceiver sensitivityL -50dBmML -55dBmM -60dBmMH -65dBmH -70dBmUH -70dBmVideo systemNTSCPAL EIACCIR auto detectionAntennaTwolength 5.5cm 2-18 inches and 8cm 3-18 inchesscrew-inomni-directionalSMAMPre-set memory frequency32 setsFunction index displayWith LED backlightProtective caseTop and bottomPower consumption650mA maximumPower supplyAC 100-240 V output 5V 1ABattery4 x AA 1.5V batteries 3-5 hoursDimensions74w x 120l x 35h mmWeight266g excuding batteries