400-470MHZ UHF transmitter mini wireless microphone audio UHF audio transmitter 2032 button for walkie-talkie Receiver 433MHZ

Product parameters:

Small size: Diameter 23mm thickness 8mm

Operating Frequency: uhf  (400-470MHZ  Random  409M、415M、421M、431M、433M、442M、458MHZ   )

Work:FM

Operating voltage: 2.2 ~ 3V (using a2032 coin cell battery) not include the battery

Current:about 15mA

Workingtime :5 hours(reference 2032 battery)

Working distance:200-500 meters in open place (voltageat different distancesvary)

Application:Soundmonitoring, security.