Have a great audio experience with the Green Lion SolarEcho ANC Infinite Playtime headphones. These headphones offer an efficient way to enjoy your favorite music, games and podcasts, because of built-in solar cells that continuously keeps charging. Equipped with Bluetooth V5.3 technology, the SolarEcho offers a stable and reliable connection within a 10-meter working distance. The 3.7V 300mAh battery provides power for extended listening sessions, with a charging time of just 2.5 hours. These headphones deliver great sound quality and clarity. The Active Noise Cancelation technology reduces ambient noise by up to -22db, offering an uninterrupted audio experience .The Green Lion SolarEcho headphones provide a balanced soundscape for all types of music and sounds. Enjoy up to 20 hours of talking time with ANC enabled, or extend it to 30 hours with ANC turned off. Specification Bluetooth Version: V5.3 Battery Specification: 3.7V 300mAh Charging Time: 2.5H Speaker Size: 40mm Impedance: 32Ohm S.P.L(at 1KHz) Active Noise Cancelling: -22db Frequency: 20Hz-20KHz Talking Time: 20H With ANC; 30H Without ANC SKU: GNSLREANCBK | GNSLREANCGYBL | GNSLREANCGYRD | GNSLREANCGYGN EAN: 6935100187013 | 6935100187006 | 6935100187020 | 6935100187037 Features Solar Charging ? AUX Support Microphone 10M Distance