Fangrui Product Details Description/features: 1. Bluetooth 3.0, Uses Two Aaa Alkaline Batteries, Ultra-thin Design, Main Body Thickness Is Only 6.7mm 2. The Button Cover Is Made Of High-quality Laser Material, With A Thickness Of Only 2.5mm 3. , Quiet Button Sound, 78-button Design 4. Compatible With For Computer Operating Systems, Such For Windows2000, Nt, Xp, Vista, Etc., No Driving Required. 5. Compatible With For Os , For And Mobile Phone Os 4.0 Do Not Need To Install Any Driver And Can Be Used Directly; Compatible With For Mobile , No Driver Is Required And Can Be Used Directly Specifications: Color: White Material:plastic Number Of Keys: 78 Keys Waterproof Function: Does Not Support Waterproofing Applicable Models: Connection Method With Computer: Bluetooth Type: Bluetooth Keyboard Battery Model: 2 Aaa Batteries (not Included) Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Package Contents: 1 X Keyboard Only The Above Package Content, Other Prod