Welcome to our JieruiDeng Shop,Sincerely hope you will love this retro keyboard and mouse setBeautiful Color Matching Fresh and beautiful color matching bring you a super visual impact, and make you feel better when using itFree Keyboard Dust Film Effective Dustproof and Waterproof, Easy to Clean and Keep Lightweight Bass Buttons, Comfortable to the Touch, a Good Choice for Learning and OfficeUltra-thin & Premium typing experience Slim keyboard with numerical keys that provide just what you need The concave & convex keys bring a whole new level of comfort to your fingertips A slightly raised bottom angle tilts the body for a more comfortable typing angle Intelligent Power Saving Powered by 4AA batteries(Not include) Adopts innovative automatic power saving technology According to stop working time is individe into > 1s,> 1min,> 8min, enter the three-level power saving mode Plus on/off switches to help conserve battery use. Can let mouse keyboard have longer battery lifeLightweight and portable keyboard it can be stored and placed as you like.Can be put into a 14-inch laptop bag Keyboard Size: 36x12x1.9cm(14.2x4.7x0.7in); Weight: 380g(0.84ib) Mouse Size: 10.6x6x2.5cm(4.2x2.4x0.9in); Weight: 70g(0.15ib)How to re-paring if the mouse keyboard can not work -Keyboard Paring 1: Put batteries into keyboard, press and hold “ESC” plus “+”, indicator starts flashing and enter into paring mode 2: Plug USB receiver into your device. Indicator stays on for 3 seconds and pairing completed -Mouse Paring 1: Put battery into mouse, switch power button on, press and hold Left, Middle, Right buttons for 5 seconds 2: Plug USB receiver into your device. Paring is completed After-Sales Service Every products in our shop has undergone several strict quality tests,please purchase it at ease