JCALLY EP05 Flat Head Earbuds 16mm driver High Resolution PET Biofilm 5N High Purity OFC Earphone With MMCX Replaceable cable Product Parameters: Speaker: 16mm Large Moving Speaker Magnet: N52 High performance magnet Diaphragm: Composite biofilm Voice coil: Pure aluminum voice coil Impedance: 32Ω Sensitivity: 112dB Frequency response range: 20-20KHz Cable Length: 1.2M HD microphone Cable: Oxygen free copper wire with HD microphone Silver plated upgrade cable: 5N OFC Silver plated upgrade cable 100 core