BUILT-IN 500MAH RECHARGEABLE BATTERY - When you leave your mouse more than 5 minutes, it will automatically get into sleep mode which saves electricity of the mouse, and click any button for waking up the mouse again. The mouse will enter low energy mode once the battery voltage is Wer than 3.3v and shows a red light inCATion from the scroll wheel. Furthermore, it will automatically turn off once the battery voltage is Wer than 3.0v and you need to recharge the battery. SILENT CLICK: Silent clicking design for left and right button fits the circumstance for using the mouse in public, such as library, dormitory, office and so on, and apart from blue light inCATion during recharging and light off afteFull recharge This design results worry-free for disturbing others. ERGONOMIC DESIGN: The bluetooth mouse is designed for right-handed user for the best hand feeling. Six efficient buttons and three adjustable dpi level (1000/1200/1600) that allow you to freely control the mouse speed. TRI-MODE CONNECTION: bluetooth 5.0/4.0 and 2.4G USB connection. You can switch to any mode by clicking the mode switch button CATed at the bottom of the mouse. The inCATion lights of bluetooth 5.0, bluetooth 4.0 and 2.4G USB are green, blue and red, respectively. Once you complete the pair of bluetooth or insert the usb, you can freely switch to each mode and the maximum operating distance of each mode is 10 meters. 1-YEAR WARRANTY: 45-day unconditional refund and 12 months repairing warranty. It iCompatible with Windows 8/10/xp, vista and mac os system. Meanwhile, the bluetooth 5.0 iCompatible with windows 8/10(but not windows 7 or xp), Android, Mac OS system; 2.4G USB connected mode support any usb enabled devices, which just need to simply insert the usb receiver. P.S. Bluetooth 5.0 supports ios system for both ipad and iphone, but the ios system has to be ios 14 or later version. Upgraded Bluetooth 5.0/ Bluetooth 3.0/ USB 2.4G wireless mouse realizes the ideal of one mouse to control three devices, which provides more convenience for people who use multiple devices. Whether its Mac, Windows, Chrome OS, or Android tablet, or switching bWeen them, the mouse works fine. About charging: The blue light on the wheel is always on when charging, and the light is off when the battery iFull. Charging time is about 3 hours. Low-voltage display: When the red light flashes at the mouse wheel, it inCATes that the voltage is Wered and it needs to be charged in time. System Requirement 2.4G wireless mode: Win XP / WIN7 / WIN8 / WIN10 or laterBluetooth 3.0 mode: Win XP / WIN7 / WIN8 / WIN10, Mac, Chrome OS, Android SystemBluetooth 5.0 mode: WIN8 / WIN10, Mac, Chrome OS, Android system (Bluetooth 5.0 does not support Win 7/ XP)Note: IOS (iPad/iPhone) is supported, but must be IOS 10.3 or above system. How to connect to Bluetooth mode Turn on the Wer switch to Bluetooth modeBluetooth 5.0 mode: (green light flashes slowly); Bluetooth 3.0 mode:(blue light flashes slowly)Press the Bluetooth pairing button for about three seconds, the Wer inCATor flashes (Bluetooth 5.0: Green; Bluetooth 3.0: Blue), inCATe that the mouse is in pairing mode.Search for BT5.0 Mouse_Pro or BT3.0 Mouse through your devices, and then click to match. The inCATor light will go out after pairing and the mouse can be used normally.