WIDE COMPATIBILITY: Compatible with iOS, Windows, Android, Linux, Chromebook, Mac, MacBook, MacBook Pro, MacBook Air, iPad, iPad Pro, iPad Air, Galaxy, notebook, PC, laptop, computer, and tablet. RECHARGEABLE: The mouse comes with a built-in rechargeable battery, eliminating the need to replace batteries. Fully charge the mouse for 30 minutes to 2 hours before first use. SILENT CLICK: Enjoy quiet, smooth, and responsive clicks that minimize noise, making it ideal for use in quiet environments. Portable and easy to use. WIRELESS BLUETOOTH DUAL-MODE CONNECTION: Use the USB nano receiver for wireless connectivityinsert into your device and turn on to wireless mode. For Bluetooth mode, turn on Bluetooth, select the BT 5.2 mouse from your device's Bluetooth list, and pair. If the Bluetooth device is not found, press and hold the left and right buttons along with the trackball for about 5 seconds until the blue light appears, then reconnect via the Bluetooth menu.