SportDOG Brand HoundHunter 3225 Remote Trainer - 2 Mile Range - Rechargeable, Waterproof Multi Dog Training Collar with Tone, Vibration, and Shock E-collar that features 2 mile (3520 yards) range and can be used to train 6 dogs with the same handheld remote with purchase of additional Add-A-Dog Collars (SDR-AH); Collar Receiver fits dogs 8 pounds or larger with neck sizes 5" - 22" Use the transmitter's dial to instantly select one of 7 levels of static stimulation in low, medium, or high ranges. The buttons deliver your choice of momentary (nick) or continuous stimulation; option to train with vibration (buzz) and tone (beep) Both the Remote Transmitter and Collar Receiver feature our DryTek technology making them waterproof and submersible to 25 feet Rechargeable lithium-ion batteries charge in 2 hours and last 40-60 hours per charge; The Remote Transmitter and Collar Receiver both feature a low battery indicator and can be charged at the same time using the included split-end charger Remote Transmitter button functions can be customized; Detailed operating guide, training DVD, and a locally based Customer Care Center, reachable at 844-209-4636, provide support when you need it