【2 Channels 3 Safe & Effective Training Modes】The dog training collar can help you teach your furry friends good behavior. The APPLYSU Remote Control Dog Training Collar offers 3 safety modes (beep, vibration (level 0-9) and shock (level 0-9)) to train your dog. The remote can also control up to 2 collars, so you can work with 2 dogs at the same time with our Impact Remote Control Training Collars. Designed for pet owners, dog walkers and professional trainers. 【Premium Design and Safety Key Lock】APPLYSU Dog Shock Collar Puts dog grooming first. Compared to other devices, these shockproof small dog collars are well-designed with a secure key lock to help prevent abuse and improve training. Easily accessible button size makes it easy for pet owners to operate. Whether you’re a first-time pet owner or a seasoned trainer, you’ll love this classic design. 【Up to 1300 foot remote control range & IPX7 Water Resistance】APPLYSU Impact Remote Control Dog Training Collar can correct annoying