RELPER Portable Mini Wireless Bluetooth 4.0 Speaker 8 LED Light Visual Display Mode Powerful Sound with Build in Microphone for Computers & Smartphones (black) Build-in bluetooth module,connect to mobile phone by one button, play music 180-degree light surround, 8 colour multifunction display Function Support: TF card/USB port/FM radio/Line In/Bluetooth Built-in microphone for hands-free phone call Built-in Li-Ion Rechargeable Battery for up to 5 hours of playtime.