Liszt Elastic Auxiliary Strap

Replacing lenses on metal frames is relatively easy; just unscrew the screws to install. For plastic frames, please follow our instructional video for guidance on how to replace the lenses.

If you purchased non-prescription lenses, you can replace them yourself. However, if you bought prescription lenses, it is not recommended to replace them on your own. Non-professional installation of prescription lenses may not balance the stress between the lenses and the frame, affecting the visual effect of the prescription.

Yes, SANGSTRE’s exclusive BulletStrip™ snap-on patent technology makes it easier to switch front frames. You can choose different frames according to different usage scenarios.

Custom-made front frames are produced using precise 3D printing technology, which can only use plastic materials. The transparent and three-dimensional effect of acetate frames cannot be achieved with this process.

If you feel that the size of the glasses do not fit you properly, you can simply replace the front frame. You can contact us to check if we have a suitable front frame in stock for you. If not, we can custom-make a front frame tailored specifically for you.

Mozart offers European and Asian styles, with each style available in M and S sizes. Europeans generally have higher nose bridges and narrower foreheads, while Asians usually have lower nose bridges and wider, flatter foreheads. This distinction provides better comfort for different people.

“Unseen intelligence, visible brilliance.”SANGSTRE aims to make even functional glasses look as stylish as non-functional ones, presenting the most natural and comfortable way of wearing.

The Mozart Collection is SangStre’s third-generation and latest product, offering significant improvements over the second-generation Haydn Collection in several key areas:

1. Wear detection feature: No need to manually turn the glasses on or off; they automatically respond based on whether they are being worn, greatly enhancing user convenience.
2. Interchangeable frame design: The front frame and temple arms are detachable, allowing users to freely switch frames as needed, adding personalization and versatility to the product.
3. Lightweight and comfortable: With multiple size options and improved integration, the glasses are lighter and more comfortable to wear, significantly enhancing the user experience.

Check Signal Interference: Avoid using glassess in noisy environments like airports or crowded places, which can disrupt Bluetooth signals. Keep your phone on your right side to reduce obstacles.
Ensure glasses Battery is Charged: Check the battery level and make sure it’s fully charged.
Check Network Status: Download videos and songs instead of streaming to reduce pressure on network speed.
Optimize Bluetooth Connection: Disconnect and reconnect the glassess, or delete and re-pair them in your device settings. For Android users, temporarily disable unnecessary app data usage.
Check Device Compatibility: Ensure the glassess and connected device (phone, computer, etc.) are compatible and updated to the latest software.
Test glasses Functionality: Connect the glassess to another device to see if the issue persists. If problems continue, contact us for technical support.

Press and hold the charger function button for 8 seconds to reset the glasses. resetting can serve the following purposes: 1.Resolve connection issues: If the earbuds are unable to pair or the connection is unstable, resetting can clear previous pairing records and establish a new connection.
2.Clear malfunctions: Sometimes, earbuds may experience software glitches, and resetting can restore normal functionality.
3.Restore default settings: Resetting returns the glasses to their factory state, clearing all custom settings (such as equalizer and touch controls).4.Achieve complete shutdown: If the glasses are not used for an extended period, they will drain power even in deep standby mode.

First, check if both arms of the glasses are charging normally. If not, follow the solution provided in the previous question.
Second, if charging is not the issue, turn on the glasses and press the charging controller for 8 seconds to reset them.
Third, if the issue is still unresolved, please contact us and explain the situation. Our customer service team will provide a satisfactory solution.

First, check whether there is oil or foreign matter obstructing the charging contacts, and make sure the magnetic contacts are clean.
Second, identify which arm is not charging, and then swap the ends of the charger and the glasses’ arms to determine whether the problem lies with the glasses or the charger.
If the issue persists, please contact us and explain the situation. Our customer service team will provide you with a satisfactory solution.

Constant light: Indicates both arms of the glasses are charging.
Flashing light: Indicates only one arm of the glasses is charging.
Light off: Indicates both arms of the glasses are fully charged or both arms are not properly connected for charging.

If the phone is not using the iPhone iOS system, other operating systems need to synchronize the Bluetooth device volume with the phone in the Bluetooth settings.

Yes, they support dual device connections. While connected to the current device, you can initiate a new pairing by turning on the glasses and pressing and holding the control button for 3 seconds to pair with a second device.

Deep standby can last for about 30 days. After the battery is depleted, it will shut down completely; charging the glasses will reactivate them.

Mozart’s touch area is located at the logo on both sides of the temples, supporting the following commands:
Double tap on the left side: Wake up voice assistant;
Double tap on the right side: Play/Pause, Answer/Hang up calls;
Swipe left: Switch songs;
Swipe right: Adjust volume.

To pair for the first time, activate the glasses using the charging controller. While charging, press and hold the function button for 3 seconds to activate the glasses and enter pairing mode.

Mozart glasses have a wear detection feature, so there is no need to manually turn them on or off. The glasses automatically activate when worn and go into standby mode when removed. After not being worn for 3 minutes, they enter deep standby mode.

Mozart feature an IP54 rating, making them resistant to dust, sweat, and light splashes. While the earbuds resist dust and light rain, they are not submersible and should not be worn in heavy rain or washed under running water.