SDRD SD-306 Bluetooth Speaker With 2-Piece Mic

Bluetooth solution: Jerry bluetooth 4.2 Bluetooth distance: 10 meters Product size: 340 x 190 x 208mm Speaker power: 2 x 15W Speaker specifications: 4 inch external magnetic Battery specification: Built-in 18650 3000mAh 7.4V Playing time: 2H-3H Charger specification: 5V-2A Charging time: 3H-4H Product material: ABS plastic Main function: Bluetooth TF card AUX U disk comes with K song mode Single machine net weight: 3.16KG Product color: gold ,black Microphone solution: BK U band A.690.3MHZ_B.687.2MHZ Microphone distance: 10 meters Microphone battery specifications: Built-in 18650 1500MA 3.7V