Infrared rays are safer. After all, ultraviolet rays are sometimes bad for people, and light waves are longer. It is essential to receive infrared signals and Bluetooth. Infrared uses light, and Bluetooth belongs to radio waves.

What's the difference between infrared and Bluetooth?

1. distance

Infrared: aiming, direct, 1-2m, one-to-one

Bluetooth: 10 meter, which can strengthen the signal, bend around, misplace, and can't be in the same room. The maximum number of links can reach 7, which distinguishes the hardware. ?

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2. industry?

Infrared: Very popular?

Bluetooth: Initial application?

3. Speed

Infrared: Fast?

Bluetooth: Slow?

4. Is it safe?

Infrared: No difference?

Bluetooth: Encryption?

5. What's the charge?

Infrared: How much-tens of dollars?

Bluetooth: 400-800 yuan

The most popular explanation: two mobile phones emit infrared rays, and there can be no object in the middle. Otherwise, after blocking the infrared transmission path, the transmission between the two mobile phones will be interrupted. Just like someone in the middle of the TV remote control can't control the TV channel. Although Bluetooth is also a wireless transmission, it is less affected by external factors than infrared rays. It's just a limited distance. As long as two mobile phones have Bluetooth function at the same time, no matter where the two mobile phones are, they can transfer files within a specified distance.