Cool Switch: When the mouse power is turned on, press the B1uetooth controller to pair it(Note: Before using the mouse, you need to bend the mouse to turn on the power. If the mouse is flat, the power is turned off and cannot be used.) Ultra-slim and Portable: The curved mini mouse is lightweight and easy to carry, goes anywhere without the weight or bulk of traditional mice. More importantly, you can fold it into a flat shape and easily fit it into your back pocket or bag for easy travel. Touch Ccroll Bar: Innovative full scroll plane lets you scroll both vertically, intuitive navigation. (Note: Can't scroll left and right) Best Compatible B1uetooth 4.0 Chip: Add a mouse to the B1uetooth device and select BLE4.0 MOUSE to successfully connect. Connect to PC, Mac MacBook pro / MacBook air. Auto Sleep Mode: The mouse will fall asleep after 10 minutes no-operation, it can be waken up by clicking any button. Compatibility: The mouse needs two pcs 1.5V AAA dry batteries to power it( included in the package).It is recommended to use a new battery for power supply, if the voltage is too low, the touch bar scrolls abnormally or does not work, This product does not include a USB Bluetooth adapter, if you need to use this product on a desktop computer without B1uetooth, please bring your own USB B1uetooth adapter.