Wireless connection: Bluetooth 5.0, Chipset: Realtek RTL8763BFR, Bluetooth protocol: HFP, A2DP, HSP, AVRCP, Communication distance: 10 meters, Double earbuds continuous listening time: about 4 hours, a total of 12 hours with charging case, Earbud standby time: about 150 hours, Single earbud battery capacity: 40mAh, Charging box battery capacity: 300mAh, Earbud charging time: about 1.5 hours, Charging box charging time: about 2 hours