Wireless Bluetooth Microphone/Speaker/Recorder. DESIGN – The excellent design of this karaoke wireless microphone makes it very comfortable to hold. The built-in high-quality Bluetooth module can be used as speaker, player and recorder, compatible with various singing applications. CONNECTION – 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 clear audio and vivid sound effect allow you to sing and listen anytime and anywhere. COMPATIBILITY – Supporting micro SD card max 32GB (Not Included) and song switch. The Bluetooth has a great distance range (10m). EASY TO USE – Multi-function buttons, easy to switch to different mode, adjust volume, sing and play music. Echo mode allows the karaoke wireless microphone to produce surrounding immersion. The USB port allows you to turn this magic piece to MP3. ITEMS INCLUDED – BONAOK microphone, Audio Cable, Charge Cable, Microphone Cover, User Manual, and Portable Case.