PetSafe 100 Yard Remote Dog Trainer. Features tone, vibration, and 15 levels of static stimulation with a safety lock for levels 8-15. This rechargeable and waterproof system ensures reliable communication with your dog at shorter distances making it ideal for around the house training. The lightweight and ergonomically designed collar fits dogs 8 pounds and up with neck sizes up to 23 inches. Train up to two dogs simultaneously by purchasing additional PetSafe Add-A-Dog Receiver Collars.