1. INDEPENDENT MICROPHONE ACCOMPANIMENT VOLUME ADJUSTMENT Two volume control knobs to individually adjustthe volume of the microphone and accompanyinginstrument 2. BUILT-IN A VARIETY OF SPECIAL EFFECTS SOUND Let you easily control the whole scene while li-ve-streaming 3. VARIETY OF UMLAUT EFFECTSThe tone can be switched arbitrarily during li-ve-streaming 4. LONGER WORKING HOURS Around 3 hours fully chargerdAround 8 hours Working Time.