ASiNG A81 PPT Page Turning Clicker With Timing Function & 32G 3-in-1 USB Receiver, Color: Green Light1. Note: Laser pens are teaching and office supplies. Do not shine directly into the eyes, and avoid contact with children. 2. Dual laser: physical laser + digital laser, suitable for a variety of devices 3. Personalized timing: You can set the timing time through the wireless presenter, turn on the countdown with one button, and flip the wireless presenter to view the remaining time of the timing (the timing function can be used without connecting to