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. Soft Touch, Quiet Button Sound, 78-Button Design 4. Compatible With for Computer Windows Operating Systems, Such for Windows2000, Nt, Xp, Vista, Etc., No Driving Required. 5. Compatible With for Mac Os Operating System, for Ipad And Mobile Phone Os 4.0 Do Not Need To Install Any Driver And Can Be Used Directly; Compatible With for Windows Mobile Operating System, 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: General Purpose 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 products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.