Wireless Camera Spy Clock can be used with the 2.4GHz wireless receiver to remote monitor a site. It functions as a clock while simultaneously can monitor a site. Highly suitable to monitor children or houses.   Products Specifications Picture Sensor 1/3" CMOS Effective Pixels PAL-628 x 582 pixels Horizontal Resolution 380 Lines Min Illumination 1 Lux Line of Sight 300 Feet Power Supply Camera Power DC 5V/8V, Receiver Power DC 9V/12V Frequency 2.4G 　 This item comes 2.4GHz receiver to receive and output the signals to other devices (such as TV or recorder)  via RCA. The video signal of the Spy Clock can be captured by the HDD recorder. It can capture up to 233 hours on a 160GB hard drive. Packages included: 2.4GHz wireless camera Spy Clock  sclockkit_001 2.4GHz wireless receiver Universal Power Adapter for clock (Input: 100V - 240V) Universal Power Adapter for receiver (Input: 100V - 240V)