【4 Humanized Modes, Eliminate Bad Behavior Effectively】Our dog shock collar features 4 humane training modes: beep(1-8 levels), vibration(1-16 levels), safe shock(1-99 levels) and Shock Boost(10% higher). Enables you to set the correct stimulation level for your pet and correct bad behavior promptly. | 【Extended 3300FT Range & 2 Channel】With 3300FT impressive range, you can now have complete freedom while training your dog at the park, on the beach, or in your backyard! The e-collar supports 2 channels and has a memory function for settings, making it easy to train 2 dogs simultaneously without resetting levels. | 【Fits for All Sizes of Dogs】Made of a skin-friendly and soft nylon strap, the beep vibration collar fits for dogs with neck sizes from 7.8 - 24.4 inches and weights from 10-120 lbs. Dog training collars are suitable for large dogs, medium dogs, and small dogs. | 【IPX8 Waterproof & No Burden Collar】The training collar is IPX8 waterproof and upgraded lightweight, you can confidently train your dog without worrying about water damage or pressure on the dog's neck. Let's discover the convenience and versatility of our waterproof device today! | 【Super Long Battery Life and Fast Charging】Upgraded technology, 3-in-1 fast charging only 2 hours to be fully charged. This dog training collar with remote provides battery life that lasts for a long time, the e collar can last up to 35 days of standby time and the remote 45 days!