Fangrui Product Details 1. Lenovo Thinkbook Bluetooth Wireless Dual Mode Interactive Design Mouse 2. Material: Plastic 3. Dpi: 160024003200dpi, Default Value 1600 4. Surface Treatment: Rubber Paint Skin Coating 5. Battery: Aax2 (not Included) 6. Adapt To The Thinkbook Family's New Pc-based Interaction Modes; Switch Between Beastsmartenergy-saving Modes By Pressing A Combination Of Buttons. 7. Eliminates Discomfort And Reduces Stress On The Wrist. 8. Fits The Contours Of Different Users' Hands With Soft Skin-like Material Side Grip Slots. 9. Long Press On The Back Pairing Button For 3 Seconds To Enter Bluetooth Pairing Mode. 10. Side Front Button + Dpi Combination Button For Dual Device Switching. 11. Easily Connect To Two Devices Via Bluetooth Wireless Technology Or Usb 2.4ghz Reception, Multi-device Functionality To Maintain A Smooth And Stable Workflow, Within 10 Metres There Will Be No Dropped Frames Or Delays In The Sense Of Stuttering. 12. Long-lasting And Stable Power, The Battery Once, The Service Life Of Up To 18 Months (not Included) 13. Size: 124.28x78.67x41.30mm 14. Weight: 85g