Products description;1，Chargeable. 2，The Terminator first applies a warning tone followed by progressively increasing tone and shock as your dog′s barking persists. If your dog is quiet for 30 seconds or more， the Terminator-resets to the mildest correction level. In this way， your pet needs only to experience the higher shock levels a few times before learning that the mild sound and shock stimulus is a warning of stronger corrections to come. Your pet will quickly learn to SHUT UP at the mild correction without having to suffer the more intense stimulus. We have found this technique of progressively increasing sound and shock is not only more humane.3，It’s more EFFECTIVE in barking habit than conventional shocking bark control collars. The technique is only found on the Terminator made by Electronic Pet Products.4，Note:Please attention that all our collars are NOT waterproof.Products Features:1，Humane uses painless tone followed by shock only if barking persists.2，Automatically increases tone and shock stimulus as barking persists.Microprocessor controlled.3，Voice Recognition feature minimizes false triggering.4，Extremely small and light weight，collar length is 18 inch.5，The biggest voltage is 13V. when shocking6，Effective on dogs from 5 pounds to 150 pounds. 7，APSD-Automatic Power Saving Mode.Products contents;1*Collar1*Charger 1*Red Belt1*Charging Cable1*Package box