Latest Upgrade Version:Stop excessive, noisy dog barking by emitting an ultrasonic sound to silence the dog; More effective than old version deterrents and waterproof.SAFE AND EFFICIENT: Contain sensitive microphone isolates, ultrasonic controller for bark with effective distance of 50 feet, and people couldn't hear the sonic (recommended starting mode for indoors is level 1, increase if needed).FOR DIFFERENT SIZES: This mini bark control deterrents uses high-frequency sound that works to reduce excessive bark of within hearing range; For 6 months and older UP TO 50 FOOT RANGE. Without need of traditional collar is safe for the most varieties of .MINI DESIGN: This ultrasonic no barking controller comes with a well-designed mini shape, can be hung on a tree, indoor, outdoor wall or fence post to stop any barking(within range); Four buttons for operation, including a test button, an off button and 3 level buttons.ENERGY SAVING: Operates 9-Volt batteries (not included),average battery life 5-6 months depending on use.Material:plasticcolour:BlackPackage Contents:1 x dog driveOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.