I have 2 IPX7 Waterproof The IPX7 high-level waterproof design allows your pet to play in the water or wear a collar to travel on rainy days. Smart Anti-Interference Dog anti-barking collar, automatic intelligent detection to identify your dog's unique barking style, and filter out potential unnecessary noise, avoid any wrong trigger to cause unnecessary injury to your dog. Protection Your Planet's Friend Choice for a Greener World Sensitivity Level The sensitivity grade number varies each time you press the power button, from 1 to 5. The lager the grade, the more sensitive the collar will act. Note: False triggering is generally caused by setting the sensitivity to an inappropriate level 2 Training Modes No Shock Mode/Safe Shock Mode,Only 2 training modes, simple and easy to operate. Note:After 5 consecutive safety shocks (to step 6), the machine will enter the protected state to protect the dog from injury. USB Fast Charging Contains a USB charging cable, which charges quickly and can be fully charged in1-2 hours. The working time is up to 10-15 days, saying goodbye to the trouble of frequent charging,It can be charged via 5V charger, power bank/computer/mobile power/car USB socket. USB Fast Charging Contains a USB charging cable, which charges quickly and can be fully charged in1-2 hours. The working time is up to 10-15 days, saying goodbye to the trouble of frequent charging,It can be charged via 5V charger, power bank/computer/mobile power/car USB socket.