Smart Detection Technology- Anti barking collar only be activated by your dog’s bark. Shock or No Shock, Multi-level for Choose - The bark collar's levels of Shock and Vibration can be adjusted from Lv.0 to Lv.7. Humane and Harmless - this no bark collar will stop working for 1 min, if it activated 7 times within 1 min to protect your dog from excessive shocks and vibration. Step by Step Anti Barking - The bark collar will automatic switch from Beep to Vibration to Shock if the dog keeps barking. Rechargeable & Rainproof & Warranty.