Features: brand new and high quality Lightweight and portable:The stylish ultra-thin design makes travel or business travel more easier Putting it in a backpack, computer bag or suitcase will never take up too much space and will not add for extra weight. Long-term use:The keyboard and mouse have built-in rechargeable lithium batteries, which can be used for more than 20 days after being fully charge (2 hours of continuous use per day). If you don'for t use it for more than 15 minutes, the keyboard will automatically go to sleep to save power. If you want to continue using it, just press any keys to wake the keyboard. Comfortable Bluetooth-compatible keyboard:The keyboard keys adopt a scissor structure, and the squares chocolate keycaps are ergonomically designed. With this keyboard, you can write quietly on tablets, and smartphones, providing you with a comfortable and pleasant typing experience. Stable Bluetooth-compatible connection:The keyboard adopts stable Bluetooth-compatible 3.0 technology, and the working distance can reach 10m. There are two way to connect the mouse: USB and Bluetooth-compatible , plug and for play, no other drivers or options. Note:Product keyboard without backlit. Specifications: Bluetooth-compatible 3.0 standard interface Effective operating distance: 10 meters Modulation method: GFSK Working voltage: 3.0-4.2V Working current: