AZDEN IWM-550 Infrared wireless microphone (Discontinued)

Modulation                   FM
Microphone type          Uni Directional Dynamic
Oscillation method      Crystal Controlled PLL synthesizer
Frequency response    50-10kHz±3dB
Deviation                      Less than 2%
Power                           2.4-3V 2 AA-size batteries
Dimensions                  Φ58x240 mm
Weight                          300g w/batteries