Item Type: For Pro Type Cover Keyboard Product Material: ABS, PU Battery Model: Lithium Ion Battery 402030 (built in) Battery Capacity: 450 Mah Color: Black Applicable To: Keyboard Size Specially Designed for Pro3, for Pro4, for Pro5, for Pro6, for Pro7, for 7 Plus Special Design, Keyboard Support for Full for Win System, Can Be Used in Many Ways Support Support Protocol: BT 3.0/4.0/1.1 Wireless Distance: About 10meters/10.9yd Charging Interface: USB C Functionality Features: Fn Combination of Multimedia Functions Features: Chocolate Key Core with PU Leather, Ergonomic Design, Simple and Compact Layout, Quiet Typing Function. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls.Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.