About this item [3 Safe and Effective Training Modes]- The dog training collar provides 3 safe and effective humane training modes. With customized Beep (1-9 levels), vibration (1-9 levels), and static shock (1-9 levels), you can easily choose the right gear to train your dog effectively. Dog training with the remote suit for small, medium, and large dogs, help dogs correct bad habits like barking, chewing, biting, and digging. [Security Keyboard Lock & Safety Mode]- The security keyboard lock on the side prevents any misoperation on the remote. No matter carry the remote in pocket or hold the dog shock collar in hands, without worrying about the accidental shock. The receiver will enter 1-minute safety mode after 8 seconds of training continuously, to avoid hurting your dogs. [Remote with Big Screen & IPX7 Waterproof Receiver]- Remote control designed dog training collar with a large screen for quick reading. The IPX7 waterproof receiver can stay in the water depth of 164 Ft for 30 minutes without taking off. So dogs can enjoy swimming, playing in the rain, or other outdoor activities. [4 Channels & Longer Battery Life]- This dog shock collar with remote has channel function allows you to train 4 dogs at the same time. Shock collar for dogs with remote up to 1000 Ft that allows you to train your pet both indoors and outdoors. The remote built-in a 500mAh Li-ion battery and the receiver built in a 480mAh Li-ion battery. The receiver is able to work 20 days and the remote is able to work 45 days after 2 hours of fully charging. [Adjustable Collar Suit for All Size Dogs]- The comfortable and adjustable nylon collar has a length of 27.5 inches, suits neck sizes from 8 to 25 inches, perfect shock collar for large dogs, medium and small dogs (5 lbs-110 lbs), such as Labrador, Collie, Husky, Golden Retriever, Chihuahua, Yorkie, Doberman, etc.