Very popular and used by expert trainers and first time pet owners. Can be used to help correct barking, leash walking, sitting, aggression and other obedience behaviors 800 Yards Range - The Remote Training Collar uses frequency to provide a range of up to 800 Yards, Easily train your dog in the park or yard. 100% Waterproof Receiver - It works even if submerged in water, allowing your dog to swim or bathe freely with the collar on. The rechargeable remote control and receiver can be charged at the same time so that your equipment is always ready to use. Dog training collar with adjustable levels from 0 to 99 for electrical, vibration, light and sound stimulation. Suitable for all dogs. Necklace in durable and adjustable (20 to 70cm) able to adapt to small and medium dogs. The collar remote and receiver have long battery life (1-2 hours charge time gives you 7-14 days of use) with lithium-ion batteries. In addition, the automatic power saving mode helps preserve battery life when not