See your dog at night from up to one-half mile away! Remotely activated by your Tri-Tronics transmitter. The Tracer is a lightweight, very brilliant, LED light device that lets you know where your dog is after dark. It has a choice of two light modes - blinking or steady. By using differing combinations of light color and mode, you can identify multiple dogs. In addition, you can leave it on as long as required or switch it on only when needed. Compatible with any Tri-Tronics G2 or G3 training system and attaches to the Tri-Tronics receiver. Available in White, Red, or Blue.