1. 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 the computer and turning on the computer)
4. Three-in-one receiver: It is both a dual-head (USB 3.0 & USB-C) receiver and a USB card reader (large-capacity TF cards can be freely replaced, up to 512G supported)
5. 100-meter remote control: The ceramic antenna responds sensitively and can be remotely controlled 360 degrees within 100 meters
6. Volume adjustment: One-button remote control of the computer volume
7. Time display & black screen countdown: Built-in clock chip, flip the wireless presenter to view the time. When the timing reminder is turned on, the default display of the remaining time of the timing is displayed
8. Other functions: full-screen annotation/focus magnification/air mouse/button customization

Parameters:
Transmitter:
1. Transmission frequency: 2.4Ghz
2. Remote control distance: 100m
3. Laser power: less than 5mw
4. Standby current: less than 20uA

Receiver:
1. Interface: USB3.0
2. Working voltage: USB cable power supply (4.5V-5.5V)

Packing list: A81 page-turner, Type-C charging cable, leather storage bag, instruction manual