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