[Dog-Friendly Barking Control Device]: When the microphone detects a dog barking, the automatic ultrasonic anti dog barking device will automatically emit ultrasonic waves, which make the dog quiet and have no impact on humans or other pets. [3 Adjustable Modes & Four ultrasonic holes]:With four ultrasonic emitting holes for more powerful functions,The maximum effective range of this ultrasonic anti barking device is 16.4FT. [ & Portable]: This dog barking box has a small and appearance, making it easy to carry. You can install it on a tree, in a dog house, on a table, or anywhere else you convenient to use. [IPX4 Waterproof Dog Barking Box]: This device adopts an IPX4 material waterproof shell, and the professional waterproof design allows you to use the anti dog barking device without worrying about weather factors. [ & Charging]: This dog barking box is equipped with a 1500mAh rechargeable lithium battery, which can work for 30 days after 5 hours of charging.The anti barking device can be used upon receipt (better charging effect before use). Two Color LED: Shows good or low battery. Microphone: Used to detect barking. Sound Activated Speaker: Produces the ultrasonic sound. Switch with 3 Levels of Operation: Ultrasonic II level:Suitable for large and mischievous dogs, Ultrasonic I level: Suitable for gentle dogs, and Audio level: Suitable for small dogs. Ultrasonic Emission Port: Four Battery Capacity: 1500mAh Power:USB Effective Range: 16.4 feet Material: plastic colour: Black Package Contents: 1 x Dog Repeller 1 x USB Cable 1 x English manual Only the above package content, other products are not included. Note: Light reflection 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.