About this item Female Side is 2 pin connector: This converter works for 2 pin cables connected with HD414. Male Side is HD580 Pin: This adapter is compatible with HD414, HD650, HD600, HD580, HD565, HD545, HD535, HD525, HD265, and HD25 headsets. Audio Unchanged: The adapter is small and convenient. It does not improve sound quality nor does it alter the original sound quality of the headset. Many Types: We also offer various types of adapters that can help connect different cables to different earbuds, allowing you to enjoy a DIY HiFi experience. Dimensions: 4.25 x 2.72 x 0.67 inches.