Fotga Anti Bark No Barking Tone Shock Training Collar for Small Medium 5-150lb Pet Dog -Humane, cost-effective and harmless to your dog. -Compact, lightweight and non-obtrusive in appearance. -Delivers increasingly louder warning tones and shock corrections of 7 levels. -Sensitivity is user-adjustable according to your dogs barking and specific environments. -Voice recognition minimizes false triggering. -Operates on a standard 6 volt alkaline battery ( INCLUDED).