General Description This dog training collar offers 4 effective and harmless modes: sound, light, vibration (adjustable to 99 levels), and static shock (also adjustable to 99 levels). It is designed to adapt to dogs of different sizes and personalities, to correct unwanted behaviors. Technical Specifications Range of 800 m, up to 1,000 m outdoors. Battery life of up to 20 days on a 2-hour charge. Durable TPU collar, adjustable from 16 to 62 cm. IPX67 certified waterproof. Lighter than competing models, making it easier to carry. Automatic power saving mode. Compatibility and Accessories This collar can be used with up to 3 dogs simultaneously thanks to its 3-channel remote control. Note: Only one collar is included. Installation Easy to install, the collar easily adjusts to your dog's neck. Follow the included instructions for a proper fit. Use Use the collar to correct your dog's unwanted behavior by choosing the appropriate mode. The built-in LED light helps you locate your dog in