The Boyt MR1001 Add-A-Collar in black and orange is designed for effective and versatile dog training. Compatible with the MR1000 transmitter this collar is perfect for training two dogs simultaneously with continuous and momentary correction capabilities. It offers a generous 1000-yard line of sight range ensuring effective communication with your pet over long distances. Featuring an LED spotlight mode the collar is adjustable to fit most dogs weighing up to 100 pounds. Equipped with a stimulation safety lock it ensures your dog's safety while allowing for effective training. The collar includes a rechargeable lithium battery that charges quickly in just two hours and offers water resistance up to three feet for 30 hours. Constructed with durable nylon webbing plastic and metal this collar combines functionality with reliability.