It's brand new. 4 Training Modes and Anti-misoperation: Use the sound, vibration (1–100 levels), shocks (1–100 levels) to safely train your dog appropriate behaviors and the light for seeking dog at night. When the training system is not being used, simply turn off the remote to prevent accidental shock Up to 3,300 ft of Remote Range: Be remotely controlled within a range of up to 3,300 ft in an open area. You can deliver commands to max 3 dogs with one remote at one time, ensuring effective training Long-lasting Rechargeable Battery: By fast-charging the lightweight collar and remote simultaneously, the collar will last for more than 40 days and the remote has up to 180 days standby time. Adjustable Collar Size: The adjustable nylon collar fits dog breeds and sizes aged above 6 months, weighing between 10–110 lb and with neck sizes of 5–24″. Choose the suitable length according to your dog's neck size Waterproof Collar and Remote: Both the remote and collar are waterproof so you can train your dog regardless of weather conditions