Dakota Alert Extra Wireless Receiver Plugs into a standard wall outlet and can be placed on a table or mounted on the wall Four different tones Classical, Westminster Chime, Ding Dong, or Whistle will sound for a few seconds Four form "C" relays (one for each zone), and one 12-volt DC output terminal that will activate for several seconds when a signal is received Receiver can be user-programmed, so the 12-volt DC terminal and one relay will activate for 10 minutes Product Dimensions: 7.5 x 6 x 2.6 inches ; Weighs 1 pound