Features 1. The appearance is designed like an alarm clock, and the luxurious outdoor ultrasonic bark stop can be hung on trees, anywhere in the house or in your yard. It can be hung, placed on tables or other places at will. When the luxury outdoor ultrasonic bark stop alarm detects excessive barking, the microphone will sense the barking and activate the component. At this point, the product will emit a safe high-frequency ultrasonic sound that dogs can hear but humans cannot. Dogs will stop barking when stimulated by sound. Because ultrasound can make dogs feel uncomfortable, they will stop barking. 3. Designed specifically for outdoor use, the outdoor ultrasonic bark arrester is durable and waterproof. There are three sensitivity levels (effective range from 4.5, 9 to 15.24 meters) and one test level. The outdoor ultrasonic bark arrester has a power indicator that can be set to "Off" to protect the battery when you leave. 4. Safe and effective: Excessive barking by dogs can have an impact on you and your neighbors. Outdoor ultrasonic bark suppressors can effectively prevent dogs from barking and do not require collars for reception. Safe and effective, suitable for all breeds and sizes of dogs. Specification Style: Manual Waterproof level: IPX4 Power supply: Micro USB interface Input voltage/input current: 3.7V/80mAh Battery: 3.7V 1500mAh ICR 18650NH Ultrasonic frequency: 15KHZ-30KHZ Product size: 11.5 x 9 x 5.5 cm Material: Plastic Color: Black Size: 12 x 6.5 x 9 cm Weight: 250 g Package Include: 1x Anti Barking Device