Feature:1. [Classic Versatile] Adopts the appearance of mainstream big sunglasses, classic and generous, fashionable and versatile, suitable for various sports venues.2. [With Stereo Headset] With two stereo headsets, you can listen to music, and you can answer calls through BT connection.3. [PC Double Lens] adopts PC double lens, wear resistant, environmentally friendly, resistant to aging, high hardness and strong bearing capacity.4. [Ergonomic Design] Ergonomic design ensures that it will not fall off easily during exercise, and it can effectively prevent from damaging the eyes.5. [Rotating Earphone, Reversible Lens] The earphone can be rotated 270°; the lens can be turned 180°, detachable and replaceable.How to Use:BT A. Power on/off.1 Turn on: Press and hold the BT button for 3 seconds, you will hear a "Dumpt" sound and the BT indicator flashes red, indicating that BT is turned on2 Shut down: In the BT standby state, long press the BT button for 3 seconds, you will hear a "Dumpt" sound and the BT indicator light goes off, BT shuts downB. BT pairing In the BT shutdown state, press and hold the BT button (about 3 seconds), and let go after hearing a beep. At this time, the BT indicator