Features: BT5.1 wireless connection, up to 10m transmission distance, no messy cables anymore. 65 keys compact layout, with multi-function keys, good operating performance, greatly improves working efficiency. Ingenious folding design, ultra-thin body, easy to carry and use. Scissor foot button structure, comfortable and quiet typing experience. Built-in 90mAh rechargeable lithium battery, low power consumption, long endurance time. Support Windows/Android/iOS, suitable for mobile phone, tablet and laptop with BT function. Specification: Type: Folding BT keyboard BT version: V5.1 Working distance: 8-10m Key number: 65 Battery capacity: 90mAh Supported system: Windows, Android, iOS Working voltage: 3.3-4.2V Folding size: 14.2 * 10.1 * 2.4cm /5.59 * 3.98 * 0.94in Unfold size: 27 * 10.1 * 1.19cm /10.63 * 3.98 * 0.47in Item weight: Approx. 185g /6.53oz Packing list: 1 * Keyboard 1 * Charging cable 1 * User manual