PRODUCT FEATURES 2.4GHz, 1/4? CMOS Camera, 380TV lines sharp picture display Receiver have 4 channels available to avoid possible interference Camera built in microphone for audio monitoring Moving detection alarm mode（Receiver can make a sound to alarm you when something are moving before camera） Open Transmission distance100 meters. Frequency points for the 4 channel is 2414Mhz, 2432Mhz, 2450Mhz, 2468Mhz,But can design for customer especially in range of 2400 MHz to 2483 MHz. SOLUTIONSThe product is cabinet and diaphanous. It is convenient to take and use.It fit for the family and office security, It also could be used in the supermarket,marketplace,small residence, baby room,door surveillance, bird watching and so on.(Attention: Receiver must link TV,LCD,or PC for monitoring displayer).Caution: This product must be forbidden for illegal use.