Control 2 Dogs at Once - This remote has a range of up to 800 meters. Control up to 2 collars to train dogs of all sizes. Control 2 dogs at the same time with just one click, no need to look at the remote. Allows you to easily train your dog in the park or backyard. 800M Range - The remote uses RF434Mhz frequency to provide a range of up to 800m, allowing you to easily train your dog in or around the park. Yard. Waterproof Receiver - Works even when submerged in water, allowing your dog to swim freely or take a bath with the collar on. The rechargeable remote and receiver charge simultaneously, keeping your devices ready to use. The remote and collar receiver use lithium-ion batteries for long life. The time will give you 7-14 days of use). In addition, the automatic power saving mode can extend the battery life when you do not use it. (battery not included) The dog collar has adjustable levels from 0 to 99 for electric stimulation, vibration, light and sound. Suitable for all dogs.