1. Keyboard with Number Pad: The BK09 Keyboard an 82-key layout with a dedicated number pad and 12 multimedia shortcuts to help you work more efficiently. 2.Multi-Device & Multi-OS: Switch between 3 devices with Bluetooth 5.1 technology. Automatically recognizes different operating systems and layouts. Compatible with iPad, iPhone, tablets, laptops and smartphones. 3.Pocket-sized for Travel: The keyboard features a tri-fold design that is lightweight and slim. Folding size is 7.28" 3.74" 0.68", you can easily put it into your pocket or backpack to carry around. 4.Quiet Comfortable Typing: Scissor-switch keys provide a silent, smooth and efficient laptop-like typing experience. The balance stand detail ensures stability while typing. 5.USB-C Charging: Built-in 210 mAh battery provides up to 360 days of standby time or 30 days of use on a full 2-hour charge, making it perfect for your business trips or vacations.