Bluetooth Version: 5.3 Driver Size: 13mm Wireless Distance: 10m Frequency Response: 2.402-2.480GHz Earphone Battery: 25mAh each Charging Case Battery: 180mAh Speaker Sensitivity: 102dB ± 4dB Speaker Impedance: 32 ± 15% Charging Time: Approx 2 hours Standby Time: Up to 90 days Working Time: Up to 5 hours @70% volume Charging Plug: Type-C