【Safe Anti Bark Device】 - Ultrasonic frequency is harmless to pets and has no effect on human ears. Humane sonic bark deterrents are professional device that effectively trains your dog to stop unnecessary barking. 【Durable & Weatherproof】 - Ultrasonic sonic bark deterrents anti-smashing, durable, weatherproof, sturdy bark box bark control, lightweight, waterproof material, IPX4 waterproof can withstand any weather conditions. making the control device an excellent outdoor bark control for dogs. 【33 Feet Effective Range】 - Outdoor Barking Control device detected barks up to 33 feet away. Covering the area indoors and outdoors. Designed for easy hanging/mounting on a tree, indoor, outdoor wall, fence post, lanyard, or anywhere to stop dogs from barking. Cute and small device. 【USB Rechargeable】 - This rechargeable bark controller with an indicator light can be used out of the box.saving you trouble and battery investment. No need to install/replace batteries. 【It is recommended to fully charge before use】 【Adjustable Ultrasonic Level Control】 - Just need to move the pointer to adjust the intensity, very easy to use. Suitable for small medium large dogs. Emits harmless and effective sounds to control excessive barking. Training is a long-term matter, some dogs may be afraid or dislike this sound and keep barking from the beginning, so please set aside up to 2~3 weeks for training.