A31 crystal earbuds

Crystal earbuds typically refer to earphones that have a transparent or crystal-clear design, allowing users to see some of the internal components. Here are some features you might expect from crystal earbuds, though it's important to verify these details with the specific product you're interested in:

1. Transparent Design: The earbuds are designed with a transparent or crystal-clear housing, allowing users to see the internal components like the drivers or circuitry.

2. High-Quality Audio: Crystal earbuds often aim to provide high-quality sound, with clear treble, deep bass, and a balanced audio profile.

3. Comfortable Fit: They are designed to be comfortable for extended wear, often with various ear tip sizes to accommodate different ear shapes.

4. Bluetooth Connectivity: Many modern earbuds, including crystal ones, come with Bluetooth connectivity for wireless pairing with devices like smartphones, tablets, or computers.

5. Touch Controls: Some earbuds have touch-sensitive controls, allowing users to play/pause music, adjust volume, and answer calls with simple gestures.

6. Charging Case: Crystal earbuds usually come with a charging case for easy and convenient storage, as well as for recharging the earbuds on the go.

7. Noise Isolation or Cancelation: Some models may offer passive noise isolation through the earbud design or active noise cancellation features for an improved listening experience in noisy environments.

8. Microphone: Built-in microphones enable users to take calls without removing the earbuds.