Expand your Optex RCTD-20U "Wireless 2000" wireless annunciator system with additional TD-20U is the battery-powered sensor transmitters. Up to nine TD-20Us can be added to one RC-20U receiver. Operates on a 9V lithium or alkaline battery. Uses passive infrared to detect motion and send RF signals to receivers. Transmission range (line of sight).The detection pattern is selectable, allowing for a 17 foot fan pattern or 50 foot beam pattern, and sends a signal back to the RC-20U chime box when compromised. The device is powered by a standard 9V battery (not included). The item "Optex Wireless 2000 Indoor/Outdoor Motion Sensor Transmitter (TD-20U)" is in sale since Friday, August 14, 2015. This item is in the category "Consumer Electronics\Surveillance & Smart Home Electronics\Other Smart Home Electronics". The seller is "800-controls" and is located in San Diego, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Croatia, Brazil, Chile, Colombia, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay, Russian federation.