Fashion smart Polarized audio Wireless Headset Acetate Eyewear . Bluetooth earphone sunglasses with TWS Headphone technology. TWS or True Wireless Stereo refers to a technology which allows you to pair two audio devices via Bluetooth, meaning that you can transmit the L channel (left) and the channel R (right) separately. Product name sunglasses earphones Color black Usage sungalasses/call/music BT Version V5.0+EDR Working time around 6 Hours Compatible Android / IOS Working distance 10m/33ft smartsunglasses #bluetoothsunglasses #androiandioscompatible