HD25-II the length is headset cable, the length is about 2 m, the left is long, and the right is short.
Equal length lines with the same length on both sides. About 2.5 meters.
Some models need to wait for a long section, such as HD25 Light
Short and long required: HD25 PLUS
Applicable to the following models: Sennheiser HD 25-SP, HD 222, HD 224, HD 230,HD 250, HD 250 Linear II, HD 414, HD 414 SL, HD 420, HD 420 SL, HD 425, HD 430, HD 440 II, HD 442 II, HD 450 II, HD 480 Classic, HD 480 CL-II, HD 480 II, HD 490 II, HD 520, HD 520 II, HD 530, HD 530 II,HD 540, HD 540 II, HD 560, HD 560 II