Mouse Rechargeable 2.4GHz / Bluetooth Multi-mode Mouse A9 Wireless How to connect to Bluetooth mode? Turn on the power switch to Bluetooth mode Bluetooth 5.0 mode: green light flashes slowly; Bluetooth 4.0 mode:blue light flashes slowly Press the Bluetooth pairing button for about three seconds, the power indicator flashes Bluetooth 5.0: Green; Bluetooth 4.0: Blue, indicate that the mouse is in pairing mode. Search for andquot;BT5.0 Mouse_Proandquot; or andquot;BT4.0 Mouseandquot; through your devices, and then click to match. The indicator light will go out after pairing and the mouse can be used normally. Matters needing attention Bluetooth mode requier the device with bluetooth function Invisible optical lamp Do not use fast charger to charge ,will damage the battery of the mouse! The charging time is about 1-2 hours, a full charging can be used for several weeksDepending on the frequency of use by each individual It will light up when charging/if the battery is fully charged, the lamp will turn off. 3-Bar battery indicator will light on only when the mouse Package include: 1x Mouse 1x USB receiver The new second generation A9 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.