Superior comfort and fit with soft in-ear cushion design. Excellent sound quality and super clear sound. 3.5 mm audio plug, the earphone is designed to work for MP3 players, CD players, portable DVD players and other 3.5mmearphone jack. Compatible with IP phone, voice chat, music appreciation, DVD/MP3/MP4, linguistic education, online game. Lightweight & stylish design & low noise. Hi-Fi stereo sound dynamic elements for excellent sound. High end sound for digital sound. Frequence range: 18Hz-20KHz. Driver unit: 10mmor 15mm. Impedance: 32Ω. Power capacity: 100mW. Cable length: about 1.0m. Sensitivity: 116dB. Plug: 3.5mmstereo microphone.