4 effective and harmless modes: sound, light, vibration (adjustable to level 99), and electric shock mode (adjustable to level 99). The training methods can be adapted to the dog's weight and personality. Put an end to your dog's bad behavior with this collar. 800 m range and long-lasting battery: This collar has a range of up to 1000 m in open areas, helping you train your dog easily both indoors and outdoors. With a 2-hour charge time, the battery lasts up to 20 days. BUILT-IN LED LIGHT FOR DOGS OF ALL SIZES: The built-in LED light makes it easier to find your dog in dark environments. This durable and adjustable TPU collar (16-62 cm) fits dogs of different sizes. Waterproof, controls up to 3 dogs at once: This collar is IPX67 waterproof and perfect for dogs who love to play in the water. The remote control has 3 channels and can be synchronized with 3 different collars, allowing you to train up to 3 dogs at once. Note: Only one collar is included. The plug conforms to the European