Waterproof Dog E-Collar Trainer with remote Rechargeable E-Collar for 2 Dogs

This thing is magical! My 8 month old German shepherd is WILD. All I had to do was beep this collar and she listens! Haven’t even had to vibrate yet! It’s pretty big so it will fit a good range of sizes and you can just cut off the excess. I love that it charges instead of needing batteries.