User's instruction: 1. Push the no-tangle hook to tie the dog's collar, then grasp the handle. Let the rope stretch when the dog wander (Please do not use your hand to pull the leash directly). 2. When you need to control the dog temporarily, pressing the "STOP" button (big button) to stop the leash from stretching automatically. 3. Pressing the "STOP" button after pushing the "LOCK" button (small button) to lock up the leash for a long time; pull the "LOCK" button back to restore the automatic extension of the leash.

• AUTO RETRACTABLE LEASH: Extends up to 16.4 feet with no-tangle hook. It ensures that you can walk with full control of your dog with instant retraction of the leash when required and give your dog more freedom to wander, sniff, and poke around.
• DURABLE MATERIAL: This leash is made of Eco-friendly material nylon, high strength ribbon designed for dogs up to 110 lbs, durable, comfortable and tangle free.
• ONE BUTTON BRAKE SAFETY SYSTEM: The reliable lock button gives you the capability to adjust leash's length when needed, allows the leash to stay at a constant length, to ensure that you could absolutely control the safety of your dogs and yourself by your single hand.
• ERGONOMIC & SAFE DESIGN: Zinc-alloy no-tangle hook (length 2.8 inch), durable ABS engineering plastics shell is friendly to environment, non-toxic and odorless. Ergonomic TPE anti-slip handle is easy and safe to grip, you don't worry about the leash will hurt your hand when dog running.
• PERFECT FOR ALL SIZE DOGS: For any types of dog, puppy, medium size and large dogs. You can give them maximum freedom while under your control.

AUTO RETRACTABLE LEASH: Extends up to 16.4 feet with no-tangle hook. It ensures that you can walk with full control of your dog with instant retraction of the leash when required and give your dog more freedom to wander, sniff, and poke around.Supersonic