ERGONOMIC: Scientific ergonomic design encourages healthy neutral "handshake" wrist and arm positions for smoother movement and less overall strain. BLUETOOTH 5.0 and 2.4GHz WIRELESS CONNECTION: With dual mode connection, The Bluetooth / 2.4GHz wireless mouse can work on TWO DEVICES, connecting one device through Bluetooth and the other through 2.4GHz USB Receiver. You could switch the mode between two devices by just switch. With only one mouse, you can switch free to control two devices, from your desktop to your tablet, laptop to , extremely convenient. Silent Click: Special soundless design for the right and left buttons, help you build a quiet atmosphere without disturbing others. Rechargeable: Built-in lithium rechargeable battery, with a charging usb c cable. No more need for extra AA battery. WIDE COMPABILITY: Bluetooth mode works with / for Android / for OS system(Compatible with one machine / / / mini, not compatible / ). 2.4GHz mode works with laptop, desktop or any device with USB port, simply plug the USB receiver, plug and play. (Note: The USB receiver is stored in the battery compartment of the mouse). Wireless technology: 2.4G&bluetooth Wireless distance: 10m Resolution: 800/1200/1600dpi Operating cycles: 1,000,000 cycles Battery: 400mah lithium System requirement: 2000/ 2003/ ME/ XP/ Vista/ Win7/ 8/ 10/ for OS/ Linux Colour:Gray Material:ABS Package Contents: 1 x Bluetooth Wireless Mouse 1 x 2.4G receiver 1 x USB C charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.