Features: Ultrasonic Design – Ultrasonic wave reaches up to 130db. Audible to dogs but not to human. Effectively target animals up to 20m away. Can also be used as dog training device. stop some unwanted behaviors, protect you from being attacked by unfriend dogs. Multifunctional – The dog repeller have 3 functions, first one is the LED light function, second one can train your dogs with low intensity of ultrasonic, the last one is anti-barking function which depends on intense ultrasonic; Fit for training most kinds of dogs and pets. Safe – If you are walking, jogging or bicycling, and you encounter a dog which tries to attack you, you can use it and press the button to the “Chaser”, then it will launch ultrasonic waves to the barking dog. So it can keep unfriendly dogs away and protect yourself from dangerous Easy To Carry – This product is small in size and easy to carry. keep unfriendly dogs away; protect yourself from dangerous dogs while walking, jogging and the bright LED flashlight is helpful for night time activities, It is useful for your daily life. Convenience – you need open the battery cover first and then put 1 piece 9V battery (not included), the sound is audible only to pets, finally turn on the switch. and it can train dogs or keep you away unfriendly dogs. Can works with most dogs. Specifications: Dog Repeller Material: ABS Plastic Color: Yellow/Black Size (W x L x H): 12cm x 4cm x 3cm (approx.) Mode: 3 Modes Battery: 9V battery (not included) Anti Bark Device Specifications: Power Supplies: 1 × 9V battery (NOT INCLUDED) Material: ABS Plastic Color: Black Suitable Range: All sizes or breeds of pet dogs 3 Levels of Operation Modes: – Low Range: up to 15 feet – Middle Range: up to 30 feet – High Range: up to 50 feet Usage: – Hanging or mounting this bark control device on a tree, wall or fence to keep your own dog or your neighbors dog from barking. – stop excessive, noisy dog barking by emitting an ultrasonic sound to silence the dog. More effective than old version deterrents and waterproof. – Make sure the microphone is less than 5 feet high and is facing the direction of the barking dog. Note: – Humans cannot hear ultrasonic waves, but precautions should be taken when preparing to use outdoor bark controls. – If the dog starts buzzing when you install, install or hang the outdoor bark control device, please keep the arm away from the human ear to avoid hearing damage. – If the dog is deaf or hearing impaired, he may not react to Outdoor Bark Control. Package: 1x dog training repeller OR 1x dog repeller + anti bark device