What's in the box:

Lightweight Headworn Headset Microphone Condenser Mic 4-pin Mini XLR Plug for Wireless Bodypack Transmitter (4)

Features:
Condenser headset microphone with 4-pin mini XLR plug is compatible with wireless bodypack transmitter.
Highly sensitive, high dynamic and wide frequency response.
Head-mounted design gives you the freedom of movement and performance.
With foam windscreen for effectively reducing environmental noise.
Wide application, can be used for speech, teaching, tour guide interpretation, etc.

Specifications:
Monomer: Back electret type
Directivity: Unidirectional
Frequency Range: 50Hz-16KHz
Sensitivity: -39dB1dB/(0dB=1V/Pa at 1KHz)
Output Impedance: 680O30%(at 1kHz)
Operation Voltage:DC 1.0V-10V
Standard Power Supply:DC1.5 V
Current Consumption: 0.5mA
Signal to Noise Ratio: 56dB
Cable Length: 1m

Packing List:
1 * Microphone
1 * Windscreen