Bluetooth Version:V5.4 Range:10m Playtime:Up to 4 hours; the case provides an additional 12 hours Battery Capacity: 30 mAh(each earbud) Charging Time: Approx.1.5hours Charging Case Battery Capacity:300mAh Charging Time: Approx.2hours *If the charging case is fully recharged,it can charge the earbuds about 3 times.