Comfortable, secure-fit silicone earplugs. Lightweight for the ultimate mobility experience with music. Wide variety of colors to suit your style. – It allows us to use them in most audio multimedia devices. – Built-in microphone for use with your smartphone, music player or tablet. – Top control keys with binding and volume controls. – High-quality casing for greater resistance. – Dynamic controller. – HD sound. – Speaker size: D10mm. – Sensitivity: 94dB+/-4dB. – Impedance: 32Ohm. – Frequency: 20Hz-20KHz. – Cable length: 120cm. – 3.5mm connector.