A4 Tech MK-100 NeckEasy Metallic Earphone
- SecureFit Design - Light Weight Ear Bud - Sound-isolating - Includes 3 Pairs (small, medium, large) of Soft Sleeves - Speaker 10 mm - Nominal Impedance:32 ohm - Sensitivity: 102dB/1KHz - Jack plug:3.5mm stereo - Frequency response 20Hz-20Khz - Weight 14g