Review on 🐶 F-color Dog Training Collar: 865 Yards Reflective Strap Shock Collar for Dogs - Remote, Light Beep Vibration Shock - Waterproof - for Small, Medium, and Large Breed Dogs (Up to 3 Dogs Supported) by Ryan Pal

I bought 7 of these in less than 6 months, EACH of them stopped working within a few weeks. I thought my dogs were being rude to them or something but that's not the case. I'm in the electronics repair industry so I opened them up and they ALL had the SAME error, the BMS board was blown. This is a circuit board that controls the charging/discharging of the battery; if the collar fails, it cannot work. Difficult to find replacements for the BMS board, they are only 18mm long, they no longer fit in the case. DON'T BUY, DON'T HOLD.