Hit the switch on this pint-sized collar light and WHOA! does it put out some powerful illumination. But that's not the half of what makes the SpotLit Disc-O Pet Light such an after-dark essential. Its innovative technology lets you choose from 6 different colored lights, making it easier to keep track of multiple animals. Or you can switch it to Disc-O mode that cycles continually through all the colors – alerting everybody in the neighborhood that your pooch is on the move. The light clips to most any collar with a sturdy stainless steel carabiner, and the 2 included lithium button batteries provide 20 hours of eye-catching illumination.