Wireless Earbuds with 50H Playback, Bluetooth v5.4, IWP™ Technology, 13mm Drivers   Music Playtime Up to 50H Frequency 20Hz-20KHz Battery capacity 400mAh (Case) 40mAh*2 (Earbuds) Latency with BEAST™ Mode 50ms IWP Tech Yes Charging Time 40 mins (Earbuds) & 1.5 Hours(Case)