Its Easy to Use. When You Want to Slow Down the Dog, Press the Button & the Rope Will Stop. If You Want to Lock It, Just Push the Small Button Forward. to Unlock, Pull the Small Button Back. Simple, Practical & Comfortable, Great for Any Types of Dog with 10 to 55 Lbs. Ergonomic & Non Slip Rubber Handle Fits in Your Hand Well for Those Long Walks. with the Reflective Tape, Your Dog Will be Easy to be Seen at Night, You Can Also Enjoy Staying Outside with Your Dog at Nigh.