For dogs 8 pounds and up or neck sizes up to 22" * Range up to 1/2 mile * 15 levels of adjustable vibration or static correction * Choose from quick vibration, continuous vibration, quick static, or continuous static correction. * Safety Time-Out: continuous static correction automatically stops after 12 seconds * Waterproof receiver collar * Collar and remote use rechargeable batteries (included) * Good/low battery indicator