Joytale Pet Collar, Size Medium

Bundle only item, due to low cost. Want this for less? Bundle!!! New in opened box Joytale Collar, size medium. There is no other size information on the box so best to be familiar with this brand as brand sizes vary. It also says it's reflective but in a dark room, I didn't see any evidence of it. However, maybe the dog has to be moving for that part to work.