The earphones themselves fall by their extremely flat cable and the metallic look.
Based on the packaging, the extensive accessories and the look of the monitors themselves, one would not expect a product for less than 25 euros.
But what can the Zinc Zn30i because so on the technical side?
Well, incorporated on cable and not interfering remote actually works only with Apple products, the volume control did not work with Android and the call acceptance function triggered with me on the phone the voice control.
Sound Technically, the earphones completely designed for mobile phones and tablets and designed their impedance. The sound of mobile phones as far as okay and balanced, but as soon as more input current flows, for example, by stereo systems, AV receiver, or headphone amplifiers have the monitors to contend with distortions and then break even quickly. Here you can tell then already the most competitive price. But on mobile devices, the sound nicely crisp, airy space comes even at low volumes, therefore. It is definitely worthwhile to experiment with the many supplied plugs and attachments to achieve the best compromise between sound and comfort.
Bottom line, I like the Zn30i, although perhaps a little more sonically capacity would have been quite useful. But for mobile phones and tablets are quite usable and the large scope of supply coupled with the interesting optics allow the earphones appear much higher quality than you would expect at this low price.