How to adjust the Vibration and Shock Level? 1: Press the 1/2 button once to change Channel 1 or Channel 2. 2: Press and hold 1/2 button until the Vibration digit number blinks, then press “ + - ” to adjust Vibration Level from 1-8. 3: Or until the shock digit number blinks, press “ + - ” to adjust Shock Level from 1-16. You also can refer to the Page 11 of Instruction. And contact Bousnic Customer Service a tutorial video When you're looking to improve your dog’s behavior at home or in social settings, the Bousnic Dog Training Collar is the perfect solution to all your dog training needs. Safe, humane, and effective, these collars are great for dogs of all shapes, sizes, and breeds. And thanks to the adjustable static shock, vibration and beep stimulation modes, you’ll find a safe stimulation that works for your dog’s behavior and needs. Dog Shock Collar Details: - Rechargeable Collar and Remote: - Remote Battery: 240mAH (Lithium Ion) - Receiver Battery: 300mAH (Lithium Ion) - Vibration: 1- 8 Levels - Shock: 1-16 Levels - Beep: Standard - Range: Up to 330 Yards - Charge Time: 2-3 Hours - Lasts 15-20 Days per Charge - LCD Display, Light Mode Order Includes: Remote Transmitter Collar Receiver with Strap Power Adapter USB Charging Cable Test Bulb Wrist Strap Contact Points (4-Pcs) Conductive Silicone (4-Pcs) Instruction Manual Safe, Effective, Humane 3 Training Modes — These Bousnic shock collar for dogs offer customized Static Shock (1-16) and Vibration(1-8) levels, as well as a standard “Tone” mode. These variable stimulations can be tailored to your dog’s temperament, while the adjustable nylon collar fits 0-27 inch in length. Up to 1000ft Long Remote Range — The remote for this dog training collar can reach up to 1,000 feet, allowing you to train dogs in the backyard, the park, or anywhere else. The remote also features a dual channel to support training 2 dogs simultaneously. Rechargeable, Waterproof Durability — Rated IP67 waterproof, this collar receiver works doesn’t need to be taken off when your dog goes for a swim, chases toys around a pool, or plays in the rain. Each dog shock collar boasts Lithium-Polymer batteries that charge in 2-3 hours and last 15-20 days. Premium, Ergonomic Design — The easy-access button sizes and simpler format are easier to operate for pet owners and help dogs learn commands more effectively. A premium training collar for expert trainers and new pet owners, the conductive silicone prongs are also safe on coats and skin.