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.