<br><b>Product features</b>： <br> <br>Brand Name: KZ <br>Model name: KZ ZSN Pro <br>Connectivity : Wired <br>Driver unit: hybird 1BA 1DD <br>Vocalism Principle: Hybrid technology <br>Resistance: 25 ohm <br>Sensitivity: 104 dB/mW <br>Frequency Response Range: 20-40000Hz <br>Control Button: Yes <br>Volume Control: No <br>With Microphone: Optional <br>Connectors: 3.5mm <br>Line Length: 1.2m±3cm <br> <br> <br><b>What’s in the box</b>. <br> <br>1 x KZ ZSN Pro Earphones <br>3 x Earbud tips <br>1 x User manual <br> <br> <br><b>Notice</b>: <br> <br>1. Please lower music volume before connecting earphones with audio devices to avoid earbud's diaphragm damage. and suggested to have a rest for a few minutes after every two hours. <br> <br>2. Yinyoo Audio have the Formal authorization from KZ company , All products in Yinyoo Audio are original.