[Switch Plug]For windows pc with system, the software can be installed automatically, plug play. ( os pc and illegal windows system need to download the software on web) [Digital ]-H90s presenter support as as digital , color and adjustable size. perfect compatible with different critical display environment such as led screen. [Spotlight function]-Emphasize and high light what you to show customer, opening size and adjustable transparent grade background. [Magnifying glass function]-Extend the detail to the audience, extend the can be adjusted according to your the needs it. [Customizable key]-The function of each key can be customized according to s different habit in configuration Panel. a pointer that can fit you to the maximum extent. [Air mouse function]-It on gyro, movement of your wrist in the air can move the cursor On the screen. this means you can use it to click hyperlink, play/pause video etc. [Alarm timer display and vibration ]-When time runs out, the song will play to alert attendees and the presenter will vibrate to remind the . [Type-C port rechargeable]-Adapt newest type-c charging port, in 90mah rechargeable battery with over heating protection function. [Anti-lost function]-It will alert you when the presenter switch goes off and forget to use Computer receiver. [Multi system compatible]-Perfectly compatible with Windows 7/8/10, OS 10.10 and above. For android and linux , presenter function also supported. (digital function not supported). Colour:black Material:plastic Package Contents: 1 x Page turning pen Only the above package content, other products are not included. Note: Light 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.