PARTICULAR DESIGN¡ª With a portable dull polish handle, BONAOK microphone is very easy to hold. Designed with a built-in Bluetooth model,it can be used as speaker, player and Recorder, compatible with various singing app TWO WAYS CONNECTION¡ª Bluetooth Connection & Cable Connection. You just need to connect your phone with cable or Bluetooth, and then open the singing APP on your phone. The built-in clearly audio and vividly sound effect can make you listening and singing anytime and anywhere.