Wireless Pager Camera incorporates a hidden camera built into a nonfunctioning pager with external transmitter. The CCD video camera is a high resolution and low lux camera (perfect for low light conditions). The 2.4GHz transmitter will transmit the video signal to a receiver that connects to the video-input jack on your VCR, TV, or computer. The complete system will setup in seconds and requires no special training. The Wireless Pager Camera has a range up to 700 feet line of sight, however with the optional Commercial Grade Transmitter you can expect to achieve up to 3000 feet depending on the number and type of walls you are transmitting through. The transmitter is external. The Wireless Pager Camera operates via an external battery pack.