The Boyt MR1000 Training Collar is expertly designed for effective dog training featuring both continuous and momentary correction modes. With a 1000-yard line of sight range it ensures reliable communication over long distances. Equipped with an LED spotlight mode this collar is adjustable to fit most dogs weighing up to 100 pounds. For safety it includes a stimulation safety lock and can be expanded to train two dogs with an additional collar. The rechargeable lithium battery charges swiftly in just two hours and offers water resistance up to 3 feet for 30 hours. Customize the training experience with 16 tone levels 36 vibration levels and 99 stimulation levels.