| 2PCS FM wireless microphone pickups wireless audio transmitter FM transmitter MIC core board V4.0-2014 version Baby parameters: Wide working voltage: the 0.7 V to 9 V Wide range: to adjust frequency in 88-108 MHZ Launch distance: 9 v work， using 70 cm wire antenna， open local emission from 50 to 100 meters， the actual environment Working voltage (v) and the power supply current (ma) and the relationship between the transmission power (dBm) is as follows: 9 v， 24 ma， 10.2 dBm (i.e.， 11 milliwatts) 8 v， ma 21， 9.5 dBm 7 v， 19 ma， 8.5 dBm 6 v， 17 ma， 7.1 dBm 5 v， 14 ma， 6.1 dBm (about 5 milliwatts) 4 v， 12 ma， 4.5 dBm 3 v， 9 ma， 2.2 dBm 2 v， 6 ma， 1 DBM (about one milliwatt) 1.5 V， 4.2 ma， 4 DBM (about 0.5 milliwatts， launch with enough general family environment， green environmental radiation small!) 1 v， 2.4 ma， 9 DBM 0.7 V， 0.7 ma， and 20 DBM (i.e.， 0.01 milliwatts) Baby wiring methods: Core board back +， -， and ANT， represent the positive， negative and antenna， the antenna general welding a 0.7 meters long short wire with respect to OK. |
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