AETERTEK AT-918 2-DOG 600 YARD REMOTE TRAINING SHOCK COLLAR,RECHARGEABLE AND WATERPROOF Range of up to 400 yards (approx. 350 meters) and signal can pass through obstacles, such as walls and fences; Rechargeable WATERPROOF and SUBMERSIBLE receiver collar with long and short prongs for all coat types; 9 Levels of progressive shock ( adjusts both in intensity and duration); 9 Levels of adjustable vibration (adjusts number of vibration bursts); 9 Levels of adjustable ultrasound (adjusts number of beeps);