FM Mini Wireless Microphone Transmitter Module

Operating voltage range [3-5V]
Frequency range [91-103MHZ] (shipping default 3V99.8MHZ)
Transmission range [3-20 m] (the larger environmental influences)
Operating current [6-30mA]
[No antenna (supplied)]
Circuit and illustrating [no]
Frequency regulation [adjustable]
Battery box [no]
Volume adjustment [no]
Interference frequency stability [poor]
MIC sensitivity [0.3 m] speak normally be received
Sound [General]
PCB size] [1.9 * 3.2CM]
Buyers to be equipped [electric iron, battery box and battery, wires, solder wire, 88-108MHZ FM receiver]
Note: This baby is less stable, easy frequency drift, as the industry can not use a wireless transmitter.