Dog Training Collar

Features:
Can be set to fixed and circular warning levels.
Lightweight design, no matter big or medium, no pressure on the puppy.
There is an automatic sleep protections mode, which automatically goes to sleep for 1 minute after working for 6 consecutive times.
With automatic memory function, the work will be triggered again within 20 seconds to 1 minute, and will be automatically started from the next level.
Double keys operation, convenient and simple.