About this item 3 Control Channels & 3 Safe Training Modes: The dog training collar provides 3 variable training modes of tone function(1-3levels), vibration(0-8levels), shock(adjustable 0-16 levels);bark collar designed for pet owners, dog walkers, and professional trainers,dog shock collar with remote can correct the bad habits like chewing, barking,biting,and digging 30 days Lengthy Runtime and 2-Hour Quick Charging: our dog training collar with the magnetic charging port takes about 2 hours for full charging. Typically used, the shocking collar for dogs can last for 15 days, while the remote can last for 30 days. Both can be charged by phone adapter, USB outlet of the PC/power bank/car, convenient and fast. 100% Waterproof and 1000 ft Range: electric collar for dogs is IP68 100% Waterproof Receiver. Please feel free to let your dog play in sea/pool/bath/rain. The range of dog trainer collars is 1000ft. Stronger and steadier signal gives you complete freedom to train your dog in huge space(backyard/park/beach) without losing control.(The remote is not waterproof, please keep it away from water) Safety lock prevent accidents and 3 channels remote : our small shock collars with remote are carefully designed with a security button that allows you to prevent any misfires, no more miss operation,protect your dog; the dog training remote also controls up to 3 dog collars, so you can work with 3 dogs at one time by having our dog collar with remote; Adjustable dog shock collar: the e-collar measures is 24inch. training collar strap made of skin-friendly and comfortable soft nylon,adjustable high quality nylon collar is comfortable for neck sizes 8-24 inch of dogs(8-120lbs),for large dogs, medium small dogs. (Please wear the training collar correctly according to the instructions)