Liz, You sent me an Auroralites collar quite some time ago and I wanted to let you know how it's working out. I constantly receive comments from people across the United States and Canada when they see Radar and I tracking at night. As well as providing for a high degree of safety for my K9 and I, the lighted collar allows me to read my dog's head position in conditions of low or no light, which allows me to read whether he's on trail or if he's lost the scent. This saves time when trying to reacquire the track. Thanks so much for such a wonderful product! Steve Urszenyi Paramedic, Toronto EMS Volunteer Search and Rescue K9 Handler http://members.home.net/k9corner