Features: 1.WATERPROOF MATERIAL: Dog barking control devices are made of high grade abs material, waterproof and durable, can be used for a long time, and can withstand various weather conditions. 2.OUTDOOR USE: Dog barking deterrent is light weight and cute design, suitable for outdoor decoration, although it can also be used indoors, but it is not recommended. 3.ADJUSTABLE CONTROL: Ultrasonic barking deterrent sound can be controlled, can make a harmless but effective sound to control excessive barking, can cope with small medium and large dogs. 4.STOP BARKING: Ultrasonic bark control device can stop your own dog or neighbor's barking, it can cover the barking sound in the area, thus solving the problem of excessive barking and noisy dogs. 5.EASY TO INSTALL: Ultrasonic dog barking deterrent devices are equipped with lanyards, easy to hang on trees, walls or fence posts, easy to operate and widely available. Specification: Item Type: Ultrasonic Bark Control Device_x000D_ Material: ABS_x000D_ Battery Type: Alkaline Batteries x 1_x000D_ Battery Model: 9V Battery (ppp3 Battery) (Shipped Without Battery) PackageList: 1 xUltrasonicBarkControlDevice 1 x Lanyard 1 x Instruction Manual