Dsan TR-2000BT Wireless Signal Light ReceiverUse the Bluetooth Wireless Receiver to add an additional wireless signal light to any wireless enabled Limitimer or TimePrompt. Up to seven timer receiver networks can operate independently in proximity. Multiple signal lights can be connected to the receiver. Communication distance is approximately 300 feet. Specifications Ports: Two RJ45 12 V power jack Switches: Rotary RF channel selector Dimensions 3 x 2 x 1 Weight: 4 oz.