The Green Lion's Echo Max Headphone offers an exceptional audio experience. It features a 500mAh battery that provides up to 50 hours of use at 50% maximum volume in Bluetooth mode. The headphone comes with a Type-C to Type-A charging cable and an AUX cable for when the battery runs low. Its lightweight design ensures comfortable wear. The headphone specifications include Bluetooth 5.3, a 10-meter range, a frequency range of 20 Hz to 20 kHz, and a 32Ω impedance. It also has a built-in microphone