DLAND Portable Foldable Bluetooth Keyboard Ultra-slim Mini Wireless Keyboard for iOS Android Windows PC Tablet Smartphone Built in Rechargeable Li-polymer Battery Foldable bluetooth keyboard: folding and ergonomic bluetooth keyboard, Pocket size, sleek and slim design. Compatible 3 major operating system: iOS / Android / Windows. Works with all Bluetooth supported devices, even laptops and computers. Made of Aircraft-grade aluminum for superior rigidity, anodized matte process creates excellent sense of touch. lightweight(0.4 lb) Closed size: 5.6 Built-in rechargeable Li-polymer battery provides 80 hours of effective usage time, on a single charge. Package includes: DLAND Foldable Bluetooth keyboard, USB charging cable, user manual.