l Frequency channel selected function, can provide 4 group different image. l Receiver can be separated 4 group wireless signal encrypted receiving. Different frequency channel can watch different range. l No need connection installed, can match with any kinds of mini camera or TV, DVD  l Low power comsumption, superb pocket, can match with any kinds of mini camera for hidden wiretap. l Transmitter/receiver can be drived by battery directly, easy outdoor using. l 2000mw power transmitter can transmit A/V long distance, receiving range will be sea of level 2000~5000m. l Can match with any kinds of wired mini camera to constitute a perfect safety and secret wireless wiretap group. l No need connection installed, can match with any kinds of mini camera or TV, DVD