Feature: 100% brand new and high quality. Quantity: 1  Wireless mini Microphone，Clip-on Lavalier Microphone easily for use Receiver 6.3mm Jack plug Frequency response:80-12500Hz Effective distance:20m It is ideal for Teaching， Conference， Monitoring etc. Transmitter Power:1x 6F22 9V battery(battery not include) Transmitter size:92*60*20mm Receiver power:1x AAA 1.5 battery(battery not include) Receiver size:70*40*15mm Package Content: 1x Transmitter 1x Receiver 1x Clip-on Microphone