Echo multi-colored headphones, 20 hours, GreenLion

Here are some specifications with Echo Max headphones from Green Lion, with an amazing sound experience like never before. The built-in battery has a capacity of 500 milliampere-hours and easily lasts up to 50 hours with sound usage at 50% of the maximum level. Also, you will find a Type C charging cable and an AUX cable if the battery runs out. The headphones are lightweight and fit comfortably in the ear. Bluetooth specification: 5.3 Maximum range: 10 meters Frequency range: 20 Hertz - 20 Kilohertz Magnet size: 40 mm Resistance: 32 Ω Headphone sensitivity: 102 dB ± 3 dB Signal-to-noise ratio: 90 dB Built-in battery: Lithium-ion polymer 3.7 volts 500 mAh Charging: USB-C / USB-A cable available Autonomy: 50 hours at 50% of the maximum volume in Bluetooth mode Your features: Assistant cable Microphone Comfortable to wear Lightweight