Features >>> 2.4GHZ High quality Color CMOS sensor for crisp, clear images Built-in microphone for audio monitoring Supports up to 4 camera with Manual and Auto switching Covert construction for more security Compact, Lightweight and Super Mini size Package Including: 2.4GHz Wireless Hidden Camera 2.4GHz Wireless Flip-type 4-channel AV Receiver A/V Cable Antenna for Receiver 8V Power Adaptor for Camera 9V Power Adaptor for Receiver