1.microphone sensitivity: -72db
2.directivity: undirectional
3.frequency response: 100 to 10，000hz
4.out put impedance: 600ohm
5.operating voltage: dc 1.5v
6.working distance: 15 to 30m

package included:
1 x microphone
1 x microphone wireless receiver
1 x microphone wireless transmitter
1 x microphone cord
1 x user manual