Colour: Dual mode- GreyConnectivity technology: Bluetooth, Radio FrequencySpecial feature: Wireless, Portable, Soundless, Rechargeable, LED LightsMovement detection technology: OpticalAbout this item[DUAL MODE CONNECTION (BT 5.1 + 2.4 GHz)]: This Bluetooth wireless mouse allows you to easily connect two devices and switch between them freely. You can connect a device with a USB port via a 2.4 GHz USB receiver and use Bluetooth mode to connect another device that supports Bluetooth. Note: Bluetooth mode and 2.4G mode cannot be used at the same time.[LED BREATHING LIGHT & 3 DPI LEVEL]: Work can be boring sometimes, here comes our RGB wireless mouse for laptop, with Bright and soft-colored breathing lights, born to eliminate fatigue and brings some fun and relaxation (Long-press the "DPI" to turn it off); What's more, our wireless mouse has 3 DPI levels (800-1200-1600) to serve you with smooth tracking on most surfaces and meet your different demands[QUIET CLICKING & PORTABL]: For most people's needs, we reduced the click noise by 90% to create a better environment for all; Silent rechargeable mouse with ultra-thin design(comes with a type C charging cable), makes it convenient and portable to carry around [RECHARGEABLE & ENERGY SAVING SLEEP MODE]. With a built-in high performance rechargeable battery, our Bluetooth mouse can last up to 30 days on a full charge; more importantly, sleep mode is automatically activated after 3 minutes of inactivity to get rid of unnecessary power consumption, ensuring energy saving and extended battery life. [UPGRADED BOSS COMING KEY]. We have added a new shortcut key, the boss key, to the back of the mouse in a commitment to better protect your privacy and increase your productivity. No matter how many web pages you have open on your computer, one click on this button and you will be instantly returned to your desktop. (Note that this feature does not apply to Mac devices).