Ltpgtltstronggtplease note this item is now out of stock until the end of julyltstronggtltpgtr ltpgtampnbspltpgtr ltpgtlightwaverf passive switches are a coampacircampeuroamplsquoordinated range of magnetic window and door switches infra red sensors and handheld controllers that work perfectly with other lightwaverf devices to help make the home safer and more comfortable switching off a radiator for example when a window is opened or activating ex