w858 Microphone Specifications: Audio Monitoring: Capacitor Output Power: 5W (Speaker Output) Frequency Range: 100Hz to 10KHz Maximum SPL: >115dB 1KHz THD<1% Battery Working Time: 5-8 Hours Charging Supply: DC 5V Battery Capacity: 2600 mAh Product Type: Full Metal Microphone Power Supply: Built-in lithium battery Reverb Mode: Echo Sound Reverberation Portable Karaoke Microphones: Mini home KTV for music playing and singing at any time. Features Microphone head has three times noise reductions handle, more economical to stress you are beautiful voice advanced technology aluminum-magnesium alloy shell. Professional tuning system, three-layer high-density noise reduction, intelligent mixing chip, intelligent compatible design. Wireless microphone: Professional audio processor.This Bluetooth microphone speaker for KTV singing, gathering singing, family singing, travel singing, car stereo, instrument recording, interviews and live act. Also, it can be a unique gift for your friends or family.Simple and Convenient Operation wireless bluetooth speakers Multi-function buttons can set the treble, bass, reverb, accompaniment, playback volume. Freedom to modify the previous and next song mode."" Made for the Karaoke lover and aspiring singer, this wireless portable microphone has a speaker at the base that projects stunning KTV live-sound with powerful adjustable, you can now show off your vocal chords anywhere and everywhere you go. This wireless speaker supports music play from USB or Bluetooth connectivity means that you can pair it with Bluetooth enabled devices such as your smart phones, tablets, laptops, computers, etc. This gives you access to your favorite playlists for hours of continuous fun microphone functions such setting up your treble, volume , bass , echo. This microphone is a rare gem and one that you really must get your hands on