This state of the art radical gadget scans all commonly used video frequencies in less than 5 seconds and picks up the video transmission then locks it in , sources from up to 500 feet away (depending on power of source transmitter) it allows the user to see what the hidden camera is seeing, making it easier to detect hidden video. The monitor display is a high resolution 2.5 color TFT screen that displays the video image and the exact frequency of the transmission. It light weight, portable and compact and perfect for counter surveillance. Specifications Full Range Frequency Scanning from 900MHz 2.52GHz 2.5 High Resolution Monitor LCD Display Shows Frequency and User Setting Details Full Range Video Protocol auto-switching for PAL / NTSC, CCIR / EIA Power 4- AA batteries (not included) or External AC adaptor Auto and Manual Scanning Modes Fine Tuning Rocker Switch for use after alert Battery life indicator on LCD Antenna Sensitivity Indicator on LCD Audible Alarm on/off Indicator on LCD Includes Camera viewer 2 x detachable SMA antenna External power adapter Alarm terminal cable Carry Case Size 2 3/4 x 4 3/4 x 1 1/2