This is from another satisfied customer. I purchased a collar for my Bouvier at the closing of the Caledon shows and I am very impressed with it. Not only does it show me where he is when running off lead in the large lumber yard where we walk, but it also lights up his other collar when I re-attach the lead, and it lights up the ground as we walk so I can see ice patches when there is no moonlight. Couldn't ask for a better piece of equipment! As soon as my brother arrives with his LabX, she will be measured for a Christmas present. I will be recommending it to all the dog owners I know who walk their buddies at night or have large yards where they run. Sally Morell CKA Secretary Caledon, ON