l 2.4GHz frequency channel selected function, can work with 4 cameras the same time. l Receiver can be separated 4 group wireless signal scrambled receiving. Different frequency channel can have different range. l No need wire connection installed, can match with any kinds of mini camera or TV, DVD to constitute a perfect safety and converted wireless wiretap group  l Low power consumption, superb pocket, can match with any kinds of mini camera for hidden wiretap. l Transmitter/receiver can use battery directly, easy for outdoor using. l 10mw power transmitter can transmit A/V long distance, receiving range will be sea of level 100m.  transmitter Operating Voltage 12V 1.25A Operating Power 50mA Channel 4 Frequency 2.4G Output power 10mW Sea level transmitting 30~100m Operating temperature -10?C~ +50?C Dimension 24*19*5mm Weight 10g receiver Operating Voltage 12V 1.25A Operating Power 240mA Channel 4 Frequency 2.4G Sea level transmitting 30~100m Operating temperature -10?C~ +50?C Dimension 1156021mm Weight 160g