bluetooth version - v4.2 connectivity type - wireless charging time - about 1.5h battery - rechargeable 45mah*2, li-polymer battery standby time - up to 260h talk time - 6-7h chip - airoha ab1522 net weight - 11 g wireless working range - 10m (without obstacles) speaker sensitivity - 94+3db at 1khz;1mw profiles supported - a2dp,avrcp,hfp,hsp speaker frequency - 20-20khz input voltage/current - dc 5v /1a play time - 5-6h material - aluminium alloy+pc+abs