Boya lavalier microphone micro-cravate superb sound for presentations and video recording compatible with: by-m1 features ■compatiable with smartphones, dslr cameras audio recorders, pc etc. omni direction condenser microphone high-quality condenser is ideal for video use low handling noise includes lapel clip, lr44 battery, foam windscreen, 1/4" adapter specifications transducer: electret condenser polar pattern omni-directional frequency range signal 1 noise 65hz-18khz 74db spl sensitivity -30db +/- 3db/0db=1v/pa, 1khz output impedance 1000 ohm or less 3.5mm (1/8") 4-pole gold plug connector accessories included lapel clip, lr44 battery, foam windscreen, 1/4" adapter battery type lr44 microphone: 18.00mmh x 8.30mmw x 8.30mmd cable: 6.0m dimensions weight microphone: 2.5g power module: 18g.