The Sony MDR-EX110AP in Red are closed, dynamic in-ear headphones designed for everyday listening and hands-free calling via the built-in microphone. They feature 9 mm neodymium drivers that deliver a frequency response from 5 to 24,000 Hz, ensuring a balanced sound profile with a sensitivity of 103 dB/mW and an impedance of 16 ohms. These earbuds are built for comfort and portability, weighing only 3 g and utilizing a Y-shaped 1.2 m cord that ends in a gold-plated 3.5 mm mini-jack L-shaped stereo plug for a secure connection. To ensure a proper fit for different ear shapes, the package includes three pairs of earbuds in small, medium, and large sizes, along with a cord adjuster to keep the cables tidy during use.