CVET TICKLESS Ultrasonic Tick & Flea Repellent

This unit appears quite thin in construction. It dangles from its useful ring which is relatively easy to use. Buddy has been wearing this attached to his harness for his walks. So far this is one week and it is still with him. I consider that the design would be more resilient if it could have a slit at each end and be threaded onto a collar rather than dangle. So far too early to tell if it is effective.