Designed for in-the-field training or hunting with close working dogs, the SportDOG Brand FieldTrainer 425X Electronic Dog Training Collar helps you and your dog focus on training. SportDOGs smallest and lightest FieldTrainer e-collar, the 425X puts 21 levels of static stimulation, tone, and vibration corrections in hunters hands. System works with up to 3 dogs (with purchase of additional Add-A-Dog collars) up to 500 yds. away. Easy-to-use controls gives a trainer correction control with a simple twist of a dial and push of a button, allowing the operator to focus on the dog(s). Waterproof collar design is submersible to 25 thanks to DryTek technology. Collar features rechargeable lithium-ion battery for 50-70 hours of use per charge. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Electronic Collars.