HIGH QUALITY MATERIAL - The timer is made of high quality and high hardness materials, which can cover the whole timer tightly, so that the timer can cope with a variety of adverse conditions.Waterproof, anticollision, anti freezing and anti scratch. CLEAR LED SCREEN- Design fits easily the in the palm of your hand, digital characters and high-resolution build in anti-glare blue screen to protect your eyes, split time could review by pressing the review button, easy to use in training. ENERGY SAVING DESIGN Shot timer provide 7 days battery life of continuous use. Automatic power turns down after inactivity when youre in ECO mode. Built-in rechargeable battery, fully charged only need 1.5 hours. 100% MONEY BACK GUARANTEE Your satisfaction is our main objective, if you have any problem or question with our timer, please feel free to contact with us. Due to the powerful functions of the product, buyers need to read the manual carefully and watch our video introduction.