无线鹅颈会议话筒-j9九游会真人第一品牌

technical parameters：
oscillation mode: pll
rf stability: ±0.005%(-10～50℃)
band width: 60mhz
sensitivity: <-97dbm for 30db s/n ratio
(s/n)： >105db
(t.h.d.)： <0.5% @ 1khz
overall frequency response: 25hz-18khz±3db
harmonic radiation: ＜-55dbc
aerial input: bnc(50ω)
transmitter output power: 30mw
pickup: cardioid electret
transmitter batteries: 1.5v*2
transmitter battery life 6-10h
receiver power: 12v/800ma