Features: the LCD monitor can support up to three cameras with manual or auto switching among cameras LCD monitor beeps when motion or voice is detected by cameras Automatically uses night vision technology at low light Each camera's motion or sound trigger feature can be armed or disarmed independently from monitor LCD monitor comes back from standby mode if motion is detected or detected sound exceeds user's preset level The camera can be mounted either on wall or on desktop A/V output to TV and VCR for larger video and recording Both camera and LCD monitor can work with rechargeable battery (Ni-MH) pack for portable use Durable weather-resistant camera construction Both camera and monitor can be wall mounted Specifications: CA240-DN camera or transmitter: TV system: PAL or NTSC Lens: 4.3mm, F1.8 fixed focus Weather-resistant: IP54 LED: eight pieces Resolution: 360TV lines Image sensor: 1/3-inch CMOS Overall size (W x H x D): 3.25 x 7.3 x 4.5 inches Channel selection: electronic tuning with PLL LCD monitor or receiver: On-screen display: alarm, trigger, volume, bright, color, contrast and tint Resolution: 480 TV lines Over size (W x H x D): 2.7 x 5.9 x 0.95 inches Range: about 600 feet at open field