Green Lion Echo Max Headphone – Black & Orange

-Charging: USB-C / USB-A cable included

-Autonomy: 50 hours at 50% of the max volume in Bluetooth mode

-Integrated battery: Lithium-ion polymer 3.7V 500 mAh

-Headset sensitivity : 102 dB + 3 dB

-Frequency range: 20Hz – 20kHz

-Signal/noise ratio : 90 dB

-Maximum range: 10m

-Impedance: 32Ω

-Bluetooth: V 5.3