The wireless FM transmitter is portable and convenient to use. It works very well in a large room or as the outdoor activities. It is very useful for teachers、 lecturers、 speakers and presenters.<br /><br />- Mode: WR-601<br />- Wireless microphone receiver and transmitter with 3.5mm type plug clips microphone<br />- Steadying Performance、 good in sound especially convenient for use<br />- Transmitter with belt clip for convenient to use<br />- Frequency Range: FM 80-12500Hz<br />- Output Impedance: 600ohm<br />- Convenient to use with the clip<br />- Transmitter powered by 1 x 6F22 battery (Included)<br />- Receiver powered by 1 x AAA battery (Included)<br />- Effective Distance: 10M<br />- Suitable for teachers、 lecturers、 speakers and presenters<br /><br />                                                                                                                                Dimensions: 3.74 in x 2.44 in x 1.1 in (9.5 cm x 6.2 cm x 2.8 cm)<br />Weight: 8.54 oz (242 g)