Function: Dual Mic ENC Bluetooth Version: BT 5.2 Earbud Battery: 30mah x 2 Charge Case Battery: 350mah Playtime: up to 4hrs (up to 32hrs in total) Audio Format: A2DP/HFP/HSP/AVRCP Connection Distance: over 10m Waterproof: IPX4 Driver Dimension: 10mm Charging Time: about 2H