A. [Broadcom BT 5.1 Chip Compatible with Many Devices] - A relatively high level of device compatibility indicates that you can use this keyboard with many Bluetooth-enabled devices. Windows, Android, and iOS systems are compatible with the keyboard. If you change your phone or laptop/tablet, you can continue using the same keyboard. B. [Suitable for Trips and Normal Use] - It is foldable. When folded, it becomes small and portable, making it easy to carry around during trips. It can also be used as a normal keyboard with a good typing experience. C. [Rechargeable Battery] - Users can enjoy up to 40 hours of writing time with a single charge. The wireless folding keyboard has a rechargeable lithium battery, and the standby time can reach up to 90 hours. D. High-grade, mini, portable, foldable wireless Bluetooth 5.1 keyboard with a Type-C charge port, suitable for smart devices such as Windows, Android, iOS, and other operating systems, like computers, laptops, tablets, PCs, phones, etc., with BT function. E. It features a well - designed structure, good materials, and workmanship. F. The whole keyboard is flat, allowing for smooth typing and a comfortable hand - feeling. G. It is equipped with a Broadcom BT5.1 chip, which offers fast, stable performance and strong compatibility, and has a wide range of uses. H. It has a built - in rechargeable battery. One full charge can last for a long time (about 2 - 3 months). I. It can connect and work with 3 devices simultaneously. Simply click fn + BT1 (key A), BT2 (key S), or BT3 (key D) to quickly switch between devices, which is very convenient. J. Press fn + C (pairing) to perform pairing and connection. K. It uses wireless Bluetooth 5.1 connection. L. The number of keys is 65. M. The chip is Broadcom BT5.1 (fast, stable, and low - power - consumption). N. It has a Type - c charging port. O. The Bluetooth transmission distance can reach up to 10 meters. P. The working voltage is 3.3~4.2V. Q. The battery is a rechargeable 90mAh lithium battery. R. The working current is less than 3MA. S. The standby current is less than 1MA. T. The compatible systems are Windows/Android/iOS. U. The type is a Bluetooth wireless keyboard. V. The applications include desktops, laptops, and tablets. W. The keyboard standard is a mini keyboard. X. The style is standard. Y. The interface type is USB. Z. The colors are black and grey. AA. The material is ABS. AB. The size when folded is 142mm x 101mm x 3.8mm, and when unfolded is 270mm x 101mm x 11.9mm. AC. Package Contents: 1. One folding wireless keyboard. 2. One charging cable. Only the above package contents are included, and other products are not part of the package. AD. Note: Light reflection and different displays may cause the color of the item to appear slightly different from the real thing. The measurement error allowed is +/- 1 - 3cm.