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 behavioral obedience. 800 Meters Range - The remote training collar uses RF434Mhz frequency to provide a range of up to 800 meters, 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. The rechargeable remote and receiver can be charged at the same time so your equipment is always ready to use. Dog training collar with 0-99 setting levels for electric, vibration, light, and sound stimulation. Suitable for all dogs. Durable and adjustable TPU collar (16-62cm) able to fit small and medium dogs. The remote and collar receiver have a long battery life (1-2 hours of charging 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 in use.