Esky Rechargeable LED Display Waterproof Electronic Fence with Heavy Duty Wire and 2 Dog Collars(A Dog Training Whistle Clicker Included) Water resistent and rechargeable Collar For all dogs(&gt;25lbs) with update version, and most reliable Up to 2500 square metre range Low battery indicator - When the light on the collar is green, it is working properly Items also include a Dog Training Whistle Clicker