Dog bark collar for large dogsNo False Triggers: Has a strict false barking detection function activated only when your dog is barking 3 Humane Training Modes: Dog bark collar with a beep vibration and shock modes 0-5 adjustable sensitivity levels Rechargeable bark collar: This dog bark collar is completely rechargeable using the included USB cable full charge in 1 to 2 Hours works for about 15 days Suitable for most dogs: Dog bark collar light weight for small dogs from 8 to 150 pounds with 2 reflective belts adjustable The No-bark collar Workflow: Press the sensitivity button for 3s No shock mode: set the SHOcK button to level 0 when detects barks it will beep+vibrate 1s then enter into a new loop mode Shock mode: Set the SHOcK button to level 1-5 when detects barks 1st time it will beep for 1s the 2nd 3rd time beep 1s vibrate 1s and shock for 05s the 4th-6th time beep 1s and shock for 05s The 7th time will activate SLEEP MODE for the 30s then enter into a new loop