There are numerous wireless cameras on the market, but while they do transmit to receivers wirelessly, they still need to be plugged in to an electrical outlet for power. But the 2.4GHz Solar Color PIR Camera & Receiver is a truly wireless camera, receiving all of its required energy from the sun. With no wires to run, this camera installs easily, providing security and convenience in a simple, economical manner. When the camera's PIR motion sensor detects motion, images and voices are transmitted. Upon receiving these signals, the receiver beeps twice, and the LED flashes for one minute, so you'll know when to record or to view on your TV or monitor. The actual transmission time is adjustable for 10, 20, 30 or 40 seconds, but the camera will continue to transmit as long as the PIR sensor is triggered. The 2.4GHz Solar Color PIR Camera's solar panel uses the sun's rays to run and maintain a charge to the camera battery during daylight hours. A negligible amount of energy is released by the long-life rechargeable battery to operate the camera at night. While the camera will work after sunset, it requires a minimum light of 3 Lux to capture images. Mount the camera in any convenient location that gets ample direct sunlight. You can adjust the camera's view angle in any direction, and the PIR motion sensor will sense movement up to 26 feet away. Connect a time-lapse VCR (sold separately) for constant image capturing, ideal for when you're away from home.