1. Plug: 3.5mm2. Frequency response range: 20-20000Hz3. Impedance: 32 ohms4. Sensitivity: 98dB5. Earplugs/earmuffs material: plastic/aluminum alloy6. Headphone cable material: environmentally friendly TPE7. Horn diameter: about 14.2mm8. Wire length: about 1.2m9. Weight: about 20gFeatures:1. Semi-in-ear design, fit the ear canal, comfortable to wear, not easy to slip off2. 4-core shocking stereo effect3. The sound unit consists of a 14.2mm moving coil4. Expand the high frequency range, stabilize the low frequency effect, and output the music details better5. Intelligent remote control operation, convenient and simple6. Use oxygen-free copper core to reduce impedance and transmit lossless sound quality7. 3.5mm plug, widely compatible and easy to use

http://olla.gr/ts5000-3.5mm-metal-subwoofer-wired-earphone-red/