Bluetooth chip model:RTL8753BFR, Bluetooth version: 5.1 Earplug battery capacity: 50mAh, Charging box battery capacity: 350mAh Charging time: 1H, Endurance time: 5H Operation mode: touch, Waterproof rating: IPX7 Certification: meet CE compliance. Have logo on the charging box & headphones label on the retail box Comes with retail box..syi