1. This handheld dog bark deterrent has a working distance of 5 meters and is suitable for outdoor use. 2. It has a BEEP mode that can be combined with training guidance. 3. The ultrasonic waves are adjustable to meet different training needs. 4. It is convenient to charge and can be connected to a computer, power bank, or charging plug. 5. It has one - button operation for both dog driving and training. Features: 1. It is a dog deterrent with a working distance of 5 meters and is suitable for outdoor use. 2. The BEEP mode can be combined with training guidance, which may make training more effective. 3. The ultrasonic waves are adjustable to meet different training needs. 4. It is convenient to charge and can be connected to a computer, power bank, or charging plug. 5. It has one - button operation for both dog driving and training. Specifications: 1. Material: Plastic 2. Color: White + Black 3. Battery capacity: 450mAh 4. Size: 10*4.2*3.7cm / 3.9*1.7*1.5in 5. Weight: 56g / 1.98oz Package list: 1. 1* Handheld Dog Bark Deterrent