Product details of Uiisii C1 Type-C Heavy Bass Earphone Light weight and exquisite arc design Comfortable wearing and not easy to fall Compact and lightweight ear house designed for a comfortable fit Intelligent controller allows you to switch songs Adjust volume and answer / end calls Compatible with MP3, MP4, tablet, phone and other devices Extremely user-friendly TPE cable, no allergic to skin Superior sound performance   Specifications Cable length: 1.2m Sensitivity: 110±3dB Interface: Type C Diameter: 12mm Frequency Range: 20-20000 Hz Connectors: 3.5mm jack