No Bark Control, Imarku Electronic Rechargeable Waterproof No Bark Control Dog Training Collar with Separate Intensity and Sensitivity Adjustments for All Dogs Humane and powerful bark collar warn with beep, and then send harmless static shock to the dog whenever it barks Waterproof, rechargeable and Power Saving with built-in Lithium ion batterie.Effective Fit Dogs:10 to 120 pound dogs. Separate Intensity and Sensitivity Adjustment Dial with 7 Correction Levels Safe-If the continuous stimulus reaches the 7 levels, the Collar will stop working for 1 minutes to protect the dog Adjustable collar strap. And sensitivity,intensity switch freely adjustable for the different sizes of dogs barking and specific environment