1/3" SONY CCD Wall Clock Hidden Camera, 420TV Lines, 3.7mm lens. Great Image, Great for Entrance. Completely covert hidden cameras looks and functions like a regular clock Capture hidden camera footage No one will suspect that this completely standard looking wall clock Great for indoor surveillance security Easy installation DOWNLOAD FAQ Camera Specifications Model GWCLK20 Image Device 1/3" SONY CCD TV System NTSC Effective Pixels 510(H)x492(V) Scanning System 2:1 Interlace Sync. System Internal Horizontal Resolution 420 TV Lines Minimum Illumination 0.1Lux Video Output 1.0V(p~p)(75 Ohm, Negative) AGC Built-in S/N Ratio More than 48dB Auto Electronic Shutter 1/50, 1/60~1/100000 Sec Automatic Lens 3.7 mm lens Power Supply DC12V Operating Temperature -10C ~ +50C