Multi dog training system

New item. was factory sealed but i opened it to see color. this comes with 1 dog collar but remote can train up to 4 dogs at once. extra collars must be purchased. 1. The maximum distance it covers is as wide as 1600 ft. 2. 100% Waterproof collar-receiver. So, your dog can wear a collar to swim. 3. LCD display with backlight screen for night using. 4. 0-9 intensity levels of vibrations. 5. 00-99 intensity levels of static shocks. 6. With its 1+4 memory settings A, B, C, D and ABCD, you don't need to reset the vibration and shock levels when you are training different dogs. (You can train up to four dogs at the same time, or train each dog individually.) 7. Safety lock can prevent wrong operation. 8.2 in 1 charging port, can charge the Remote transmitter and collar-receiver at the same time, Charging only need 2-3 hours, can long standby, persistent work. 9. Independent buttons for Beep, Vibration, Static Shock and Emergency Flashlight. 10. The Remote transmitter and collar-receiver with power indicator, There is also a low battery warning reminder. 11. Size Adjustable Collar Strap, Length from 0 to 28 inch, fits dogs from 15 to 150 lbs.