2 Humane Training Modes & 5 Sensitivity Levels - This dog bark collar features beep and electrostatic shock modes, as well as 3 sensitivity levels to effectively detect barks from dogs of all sizes. You can adjust the sensitivity of this anti-bark device from 1 to 5 according to the environment and actual needs. The higher the level, the more sensitive the trigger sensor and the faster the start. Anti-False Triggers - Our dog bark collar is equipped with a smart sensor and chip that only responds to your dog's specific barks! No more false triggers from other ambient noises or other dogs, faster and more accurate activation, without delay. 7-Stage Automatic Cycle - To protect your dog, if the anti-bark collar works 7 times in a row, the indicator light will flash quickly, and if it stops working for 1 minute, it will enter sleep mode. Very user-friendly and effective, it has a progressively amplified audible alarm and electrostatic discharge technology. Rechargeable and Waterproof