The REMAX RM 510 in-ear earphones with metal box in black are a stylish and high-quality audio accessory. Here are some key features and specifications of the REMAX RM 510 earphones:

1. Design: The REMAX RM 510 earphones feature an in-ear design that provides a comfortable and secure fit, allowing you to enjoy your music for extended periods without discomfort.

2. Sound Quality: These earphones deliver clear and crisp sound with good bass response, making them suitable for a wide range of music genres.

3. Metal Construction: The earphones come with a durable metal housing that not only enhances the overall aesthetics but also provides added protection against wear and tear.

4. Tangle-Free Cable: The REMAX RM 510 earphones feature a tangle-free cable design that helps prevent knots and snags, making them easy to store and carry around.

5. Compatibility: The earphones come with a standard 3.5mm audio jack, making them compatible with a variety of devices such as smartphones, tablets, laptops, MP3 players, and more.

6. Metal Box: The earphones come with a stylish metal box for convenient storage and protection when not in use, ensuring they stay safe and organized.

Overall, the REMAX RM 510 in-ear earphones with metal box in black are a great choice for those looking for a combination of style, durability, and excellent sound quality in their audio accessories.