Detail :
Buy Online Green Lion Echo Max Headphone - White in QatarSpecificationBluetooth: 5.3Maximum range: 10 mFrequency range: 20 Hz - 20 kHzMagnet size: 40 mmImpedance: 3202Headset sensitivity: 102 dB + 3 aBSignal/noise ratio: 90 dBIntegrated battery: Lithium-ion polymer 3.7V 500 mAhCharging: USB A to Type C cable includedAutonomy: 50 hours at 50% of the maximum volume in Bluetooth mode