1、Premium material: Made of premium quality material, comfortable for dogs to wear, without any pain. 2、Three training modes: Our dog barking collar has three efficient training modes and different sensitivity levels, which can give different levels of training depending on the size and breed of the pet. 3、Smart sensors: Our bark collar is equipped with smart sensors and chips, which can precisely identify your dog\u0027s bark, making the activation more effective. 4、Rechargeable collar: Our dog barking collar is rechargeable, can be used for a long time after a full charge. 5、IP67 waterproof: IP67 waterproof rated design for indoor and outdoor use in all weather conditions. Features: Premium material: Made of premium quality material, comfortable for dogs to wear, without any pain. Three training modes: Our dog barking collar has three efficient training modes  and different sensitivity levels, which can give different levels of training depending on the size and breed of the pet. Smart sensors: Our bark collar is equipped with smart sensors and chips, which can precisely identify your dog's bark, making the activation more effective. Rechargeable collar: Our dog barking collar is rechargeable, can be used for a long time after a full charge. IP67 waterproof:  IP67 waterproof rated design for indoor and outdoor use in all weather conditions. Specifications: Color: black, white (optional) Operating voltage: 3.7V Power consumption: sleep current 20uA, standby current 300uA Battery capacity: 300mAH Rated input: DC5V/1A Waterproof rating: IP67 Operating temperature: -10C°~+50C° Storage temperature: -20C°~+60C° Package weight: 67g Package size: 7 * 4 * 3.7cm Package List: 1 * Dog Bark Collar 1 * Nylon Belt 1 * USB Charging Cable 1 * Test Bulb 1 * User Manual 1 * Dog Bark Collar 1 * Nylon Belt 1 * USB Charging Cable 1 * Test Bulb 1 * User Manual