?The WR-601 Collar Clip Style Wireless FM Transmitter &amp; Receiver Set with Mini Clip Microphone is portable and convenient to use. It works very well in a large room or outdoor activities. Widely seen among teachers£¬ lecturers£¬ speakers or presenters£¬ it could amplify your voice to make it heard clearly within a certain area. This FM transmitter£¬ made with high-grade material and exquisite workmanship£¬ ensures good durability and reliability. It is designed with clip style£¬ conveniently free your hands while you are teaching or making a speech. A practical item for all of you!                                    Features             High quality and in new condition<br> Wireless microphone receiver and transmitter with 3.5mm type plug clips microphone<br> Steady performance£¬ good in sound<br> Transmitter with belt clip for convenient to use<br> Mainly used by teachers£¬ presenters£¬ speaker and lecturers etc.<br> Amplify your sound to make it clearly heard    <br>                                                            Specifications             Mode     WR-601    <br> Output Impedance     600ohm    <br> Transmitter Power Source     1 x 6F22 Battery (Included)    <br> Receiver Power Source     1 x AAA Battery (Included)    <br> Effective Distance     10M    <br> Suitable for     Teachers£¬ Lecturers£¬ Speakers and Presenters    <br> Dimensions     (3.74 x 2.44 x 1.10)" / (9.5 x 6.2 x 2.8)cm(L x W x H)    <br> Weight     3.03oz / 86g    <br> Frequency Range     FM 80-12500Hz     <br>                                                             Package Includes            1 x Receiver<br>1 x Transmitter<br>1 x Microphone<br>1 x 6F22 Battery<br>1 x AAA Battery<br>