WIRELESS DOORBELL KIT The 21st Century has yielded thousands of clever household gadgets but almost all of them suffer from one shared problem—the batteries. Now KooPower offers a Wireless Doorbell Kit that needs no battery for the transmitter. The KooPower Wireless Doorbell utilizes a tiny piezoelectric generator—similar to a push-button barbecue lighter—that creates the electricity and sends a signal to the receivers. The waterproof transmitter is easily mounted outside without wires while the receivers are plugged into any available power outlet. Each receiver features 25 different ringtones along with a flashing LED light for visual indication. With a 500-ft. (150 meters) range, the receivers work great any place around the home or office. Each receiver will work as a repeater which transfers the signal an extra 500-ft. range. Visit www.koopower.com.