Ultrasonic Dog Chaser Pet Repeller Trainer LED Flashlight Effectively HousingPet Supplies，Dog Supplies，Training & Obedience，Training DummiesUsed to prevent dog attacks， issue ultrasound to repel the dog or wild wolf.In normal situation， it can be used as a normal flashlight to illuminate at night. Ultrasonic wave reaches up to 125db. Audible to dogs but not to human.Effectively target animals up to 20m away.Can also be used as dog training device.Model: MT-651Housing material: plasticSize: 13.5*5.7*3cmColor: black Power: 1*9V battery Suitable users: joggers， walkers， bicyclists， delivery people， police. Package includes:1x ultrasonic dog chaser1x 9V battery 1x English user manual