COVERT CAMERA HOUSED IN A WORKING SMOKE DETECTOR FOR HIGH-PERFORMANCE, COVERT SURVEILLANCE ; NTSC COMPOSITE VIDEO; AUTO ELECTRONIC IRIS; 3.6MM, FIXED FOCUS WIDE-ANGLE LENS; RCA TYPE VIDEO & 2.1MM DC JACKS; FOR CEILING-MOUNT INSTALLATIONS; INCLUDES 12V DC POWER SUPPLY, 50-FT VIDEO/POWER CABLE & MOUNTING HARDWARE; DIM: 1" DIA X 1.75"H; COLOR; 1/4" SUPER HAD CCD; LIGHT SENSITIVITY: 0.5 LUX; 330 LINES