... hear songs,answer calls. 2.Adjust the volume,control music,video playback. Clear,hi-fi audio 3.OEM welcome 1. PU ... control for volume.Headphone wire parameters:Vocal: Moving Coil type 16mm diameter unitFrequency range: 20Hz-20, 000HzImpedance: 32ohmSensitivity: 112dB (at 1kHz)Maximum ...