Wireless headphones

According to the electromagnetic wave frequencies used by wireless headphones, they can be classified as:
Infrared (30um to 3mm, 10ghz to 1000GHz) wireless headphones
Mibo (Mibo 10~1m VHF 30MHz~300MHz) wireless headphones
Decimeter wave (decimeter wave 1m to 0.1m ultra-high frequency (UHF) 300MHz to 3000MHz) wireless headphones
1. Infrared wireless headphones
Advantage: Currently, the technology is already quite mature
Disadvantages: 1. The working distance is within 7 meters; 2. Poor diffraction: If there are obvious obstacles (such as people or large pets) between the infrared wireless headphones and the transmitter, the receiving of the infrared headphones may be interrupted.
Ii. Mibo Wireless Headphones (" FM Frequency Modulation Headphones"
Advantages: 1. Theoretically, N receivers within the working range can listen simultaneously, making it a one-to-many wireless audio broadcasting system; 2. The signal has strong diffraction. 3. The usage distance should be between 10 meters and 70 meters as indicated.
Disadvantages: 1. Falsely marking the working distance; 2. Strong noise interference; 3. Unstable signal reception.
Iii. Decimeter Wave Wireless Headphones (Bluetooth)
Advantages: 1. Working distance (100 meters), providing more flexible working space; 2. It has a good music playback effect; 3. The confidentiality of communication is relatively strong; 4. Better sound quality; 5. More energy-efficient; 6. Lower cost.