【3 Training Modes】 Our dog shock collar offers Static Shock (1-18 levels) and Vibration (1-16 levels) and Beep modes（8 kinds）, please choose the safest mode to train your dog.With training, you can effectively regulate inappropriate dog barking behavior. It can be used as a bark collar to train dog pets' bark behavior. 【Waterproof speaker Outlet】With the unique speaker outlet design,which is IP67 level waterproof , beep modes (8 kinds) sound is more louder than that of any others, train and regulate dogs‘ behavior effectively only through the sound，rather than shock mode. 【Underwater Activities Available】As one of dog accessories in dog collars, harnesses & leashes, IP67 100% waterproof receiver can stay in the water for 30 minutes, no need to remove the collar when swimming. 【Safe e collar for dogs training】 Decrease accidental shock by sliding the security keypad lock to prevent misoperation. Award-winning at pet care, dog training & behavior aids. 【For All Size Dogs Pet】 The adjustable nylon collar fits for neck sizes 7.8" - 27" dogs around 15 to 100 lbs.It is a suitable dog collar for large dogs/medium dogs/small dogs.