Description “Green Lion Barcelona Smart Glasses Lens Material: Polarized Anti-Blue Lens -Frequency Response: 2400-2480MHz -Built-in Microphone & Speaker -Transmission Distance: 10 m -Charging Type: Magnetic -Sensitivity: 95±3 dB -Battery: 55mAh*2 -Waterproof: IPX4 -Impedance: 32Ω -Bluetooth: V5.4 -Playtime: 5 Hrs -Talk Time: 5 Hrs -Voice Assistant -Touch Control -TWS Function”