Review on 🐶 eXuby Tiny Dual Shock Collar: Compact Size, Powerful Features - Ultimate Control with Sound, Vibration, and Shock - 9 Levels of Intensity - Convenient Pocket-Size Remote - Extended Battery Life - Water-Resistant Design by Laura Thompson

The upside is they are tiny and fit my 10lb 7-8 inch pets. Neck. This is the minimum size I would try. They hold a charge very well and appear to be well made. The main disadvantage is that the collars do not always work. I'd say they only work 85-90% of the time, even at short ranges (less than 20 feet). I live in an apartment so I'm trying to teach my pets to be less noisy. The beep works the most reliably, then the vibration, I describe the beats separately. Low battery is not reported, but I charge it every week. Sometimes the collar doesn't work, but it works after 5 seconds or 5 minutes. Often pets can accidentally turn off the collars, the button should take a little longer before it toggles. The electric shock doesn't seem to work after the first two weeks but the display on the tester still works and they still smack my hand when I try. My animals are stubborn and have long hair so they can ignore it. I also wish the tear-off collar design was in place of that one-piece seat belt.