Enhance Battery Working Time And Display: The chargeable receiver is built-in 1200mAh battery for 8 hours use time and fully charged in 3 hours. The microphone does not come with any batteries, we recommend using 2 AA alkaline batteries. The display can show the battery power and signal strength in real time, don't worry about Suddenly not working.
Multipurpose Microphone: Built-in moving-coil Cardioid microphone, widely applied to conference, speech, Web podcast, Yoga instructor, church, get together, Family party, Opening Ceremony, dancing instructor, Promotion etc. If you use multiple microphones at the same time, Please Open the microphone battery cover to switch channels otherwise there maybe noise or no sound (Each microphone channel number is inconsistent to avoid interference).
Precautions: If your microphone has no sound, make sure you have enough power for the microphone and receiver. Insert the MIC jack, Not an AUX jack. Not supported Bluetooth speaker and MacBooks.