Geepas Double 15 inch Professional Speaker System with hUSB/SD/FM. Bluetooth. Disco Light. S/N: 80d8. Impedance: 4 ohm. Frequency: 20Hz-20KHz. Bluetooth version: 2.0. Speaker. Specification: 15". 2 woofer + 4 tweeter + 4". 2 mid range speakers. Wireless mic workable distance: 8 to 20 meters. Wireless mic battery type: AA battery (not included). Function: Radio/USB/SD card/Wireless mic/AUX/Remote control. Additional features: LED display; LED lights. Power source: AC 220-240V 50/60Hz; 150W.