4 Effective and Harmless Modes: Sound, Light, Vibration (adjustable to level 99) and Electrostatic Shock Mode (adjustable to level 99). The training methods can be adjusted according to the dog's weight and personality. Stop your dog's bad behavior with this collar. 800m Range & Long Battery Life: This collar has a range of up to 1000m in open areas, helping you easily train your dog indoors and outdoors. With a 2-hour charge, the battery lasts up to 20 days. BUILT-IN LED LIGHT FOR DOGS OF ALL SIZES: The built-in LED light makes it easy to find your dog in dark environments. This durable and adjustable TPU collar (16 - 62 cm) fits dogs of different sizes. Waterproof, control up to 3 dogs simultaneously: This collar is IPX67 waterproof certified, perfect for dogs who love to play in the water. The remote has 3 channels and syncs with 3 different collars to help you train up to 3 dogs at the same time. Note: Only one collar included. The plug is EU standard PORTABLE, LIGHTWEIGHT AND