Ultra Slim and Lightweight Portable Design, snaps flat and slips easily into a pocket or bag. Power switch: Flattens for portability (power off), curves to use (power on). Touch Scroll Bar: 2-way touch scrolling allows vertical scrolling for smooth, intuitive navigation. (Note: Horizontal scrolling is not supported.) Auto Sleep Mode: The mouse enters sleep mode after 10 minutes of inactivity and wakes up when any button is clicked. Requires two 1.5V AAA batteries (not included). Use fresh batteries for optimal performance; low voltage may cause abnormal or non-functional touch bar operation. Optical Mouse: Features a fast-tracking sensor for smooth performance on most surfaces (not recommended for glossy surfaces). Ambidextrous design. Bluetooth Connection: Insert batteries, bend the mouse, then press and hold both left and right buttons simultaneously for several seconds until the blue LED flashes. Enable Bluetooth on your device and search for “BT3” to pair. Bluetooth Pairing: Press and hold the right button for 6 seconds until the blue LED flashes. Dimensions: 13 × 5.7 × 1.5 cm