Perfect for Training, Simple and Effective: That electric shock collar is designed with 3 extremely efficient harmless modes : beep(standard), vibration(standard), safe shock (adjustable 1-16 levels), which can help you train your dog behave well | Up to Almost 1000ft Range: That remote training range of this e collar is almost 1000ft, which makes sure you can enjoy the training time with your dog in the backyard, the park, at the beach or anywhere else. The remote also features a dual channel to support training 2 dogs simultaneously. Additional collar should be purchased separately | Rechargeable and IPX7 Waterproof: That electronic collar is rechargeable with built in lithium battery. You can charge the shock collar with your phone adapter, which is very convenient. The collar receiver is waterproof IPX7, offering you maximum flexibility during the outdoor activities | Comfortable for All Sizes of Dogs: That e collar Receiver is mini. Meas.2.3(W)*1.4(W)*1(H)inch, only Weight 0.12Lb. Thin and lightweight. The adjustable nylon collar fits 6-27 inches.The training collar is very comfortable for small medium large dogs or other pets (8lbs -120lbs). The remote is ergonomic designed. It is easy to hold and keep track of | Long battery life: That e collar uses the lithium battery technology providing battery life that lasts for a long time. Besides, it takes only 2-3 hours to be fully charged. but for the initial charge, be sure to charged it for 4 hours. Typically used, the receiver will last for 11-15 days, while the remote battery will last for over 1 month