[Effective & Safe Anti Barking Device]: The barking control device is a highly efficient solution to stop dogs from barking excessively. It uses ultrasonic technology to emit a gentle but effective high-frequency sound that stops dogs from barking without causing harm or distress, making the dog quiet and not affecting humans or other pets. [3 Adjustable Modes & Range Up to 50Ft]: The bark device has three adjustable modes: normal mode, enhanced mode and general mode, the three modes correspond to the type of ultrasonic waves are intermittent, continuous and inverter; intermittent mode is designed for smaller or timid breeds, continuous mode is perfect large dogs and more energetic dogs, inverter mode is more suitable for gentle and quiet dogs. [Rechargeable & Easy to Use]: This ultrasonic bark control device is equipped with a 2000mAh rechargeable lithium battery, which can work for 30 days after 2 hours of charging. The housing is sturdy and durable, no other complicated operation is needed, and it is ready to use after receiving the dog deterrent device (it is best to charge it before use). [Durable & Waterproof Barking Box]: This bark silencer has an IPX4 waterproof housing and its professional waterproof design allows you to use the anti-bark device without worrying about the weather. Whether it's windy, raining or snowing, our anti bark device will stand up to the elements. With its waterproof design, you can use it outdoors with confidence without worrying about water damage. Colour:Green Material:Plastic Package contents: 1x Anti Barking Device 1x USB Cable 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.