Features:

• NOT FOR PHONE OR LAPTOP - This is not meant for smartphones or laptops. 
• WIRED TO WIRELESS INSTANTLY - Convert any existing Wired Voice Amplifier or any Amplifier Speaker into a wireless Voice Amplifier. Just plug the receiver into the MIC port of the speaker & press pairing button on the headphone for 3 seconds. NOT FOR 3.5mm AUX PORT. 
• GREAT ADDITION TO WIRED VOICE AMPLIFIERS FOR TEACHERS - Be it Nefficar Voice Amplifier or Ahuja Voice Amplifier, this wireless Mic adapter for amplifier works like a charm
• MULTIFUNCTIONAL - Connect it to a any high power speaker & convert it into a PA system - be it gym, dance class or yoga class
• CONVENIENT DESIGN - Can be disassembled easily and either head worn or used as hand held mic for conferences & workshops - better stability than wireless mic bluetooth system
• RECHARGEABLE - With built in 380 mAH wireless mic battery (below 400), it can be used easily for 3-5 hours per charging, comes with a 3.5mm interface receiver which can be used with most 3.5 mm MIC jacks, and a UHF transmitter mic that is more stable than bluetooth microphones for singing, bluetooth mic amplifier, bluetooth microphone Karaoke, and any other bluetooth mic adapter

Legal Disclaimer: Keep mic away from the speaker to avoid howling sound.
The speaker system needs to have a microphone port - not suitable for AUX port.

Details: 1. Stylish, ergonomic and comfortable design

2. Lightweight microphone

3. Work with any speaker with φ6.5mm MIC input or 3.5mm MIC input

5. Connect to  big speaker (more than 15W) or amplifier speaker