Green Lion Solarecho ANC Infinite

Active Noise Cancellation (ANC): Reduces noise by 22 dB. Battery Life: Up to 30 hours of usage without ANC; 20 hours with ANC. Bluetooth Version: Equipped with Bluetooth 5.3 for better connectivity. Charging Time: Fully charges in 2.5 hours. Working Distance: Effective Bluetooth range of up to 10 meters. Speaker Size: 40 mm drivers for sound output. Frequency Range: Covers 20 Hz to 20 kHz for a wide audio spectrum