PetSafe Remote Dog Trainer with Vibration Plus 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