Hoco BK3 Silver Karaoke Microphone. Micro USB and Micro SD Card connectivity. Bluetooth Connectivity to devices, apps and sound systems. Micro USB to 3.5mm Aux Jack. Micro USB Charging Cable. 18650 removable 1800mah battery with up to 5 hours play. Aluminium Alloy and ABS quality feel. Full playback on mic remote with reverb adjuster.