1.OPEN EAR LISTENING DESIGN: Our smart glasses use an open ear design and have high quality sound, allowing you to hear the audio being transmitted by your device while still hearing ambient sounds for your . 2.TWS 5.3 BLUETOOTH TECHNOLOGY: Our devices are equipped with TWS 5.3 technology, which provides a fast and reliable connection that promotes high-fidelity sound transmission. Whether you're taking a call, following GPS navigation, or listening to your favourite music, it delivers great audio. 3.TOUCH CONTROLS FOR EASY OPERATION: Our bluetooth glasses with touch-sensitive controls make it easy to manage your audio experience without having to operate a mobile phone, tablet or other device. Simply press and hold the touch button area for 3 seconds to switch on and link to Bluetooth called 'TWS-F', and press and hold for 5 seconds to switch off. Follow the instructions in the user manual for touch controls to connect and hang up calls, play and pause music, and more. 4.COMFORTABLE TO WEAR WITH UV PROTECTION LENSES: Our bluetooth sunglasses are equipped with lenses, which effectively filter the light and protect your eyes from fatigue, especially during outdoor activities. The Bluetooth sunglasses are light and designed for comfortable and stable wear, suitable for all face shapes and wear firmly during strenuous exercise.