it is very happy that you have this professional wireless clip-on mini microphone of good quality which will bring you convenience when you are using it in the situation of teaching , conference , monitoring etc.
Modulation :   FM
Frequency response : 80 ~ 12500Hz
Output : impedance : 600 Ohm
Operating  Voltage :

• one 9V "6F22" Type battery For Transmitter (package not include)
  
• one 1.5V AA type Battery For Receiver (package not include)

Effective distance : 30 meters (Battery Full Power)

Receiver With 6.5mm Plugs ,so Amplifies on the equipment to have the 6.5MM microphone connection