This fully waterproof dog training collar and transmitter are designed for field training and hunting with close-working dogs. With an easy-to-read display and large buttons, it's simple and easy to use.Specs

• Dog size: For dogs 8 pounds or larger with neck sizes 5" - 22".
• Batteries: Rechargeable lithium-ion batteries.
• Charging time: 2 hours.
• Battery life: 50 to 70 hours per charge.