The OPPO MH130 earphones with a microphone have an ergonomic shape that allows you to enjoy music for a long time without discomfort. Universal: compatible with all mobile devices with a universal 3.5mm jack input. Noise-canceling design allows you to experience high-quality, clear sound without background noise. The built-in microphone allows for convenient phone calls. Specification: Cable length: 110 cm Frequency range: 20-20000 Hz Sensitivity: 105 ± 3dB Impedance: 32 Ohm