3pcs DIY 3-Tube Wireless Microphone Kit Wireless Microphone Module Electronic Manufacture Kit
This suite converts sound signals into radio signals, and restores sound to another place by wireless means using a normal FM radio.
It is interesting and can also learn electronic technology to improve practical ability.
The following are common uses: wireless microphones, wireless broadcasting, wireless hawking, radio electronics, doorbell and so on.
The frequency range is 80MHZ-108MHZ (adjusting the L1 coil turns to change the frequency)
Working voltage: 3V-9V
Circuit board size: 5.1 x 2.6MM
Radius of emission: 100 meters (ordinary radio, antenna 50CM long thin wire, can be adjusted to the distance of about 15 meters)
3 x DIY 3-Tube Wireless Microphone Kit