... handsetMaterialABSMOQ1000pcsConnectors3.5mmLogosilkscreen, heat transferColorBlack, blude ,yellow, red, prink, green, PMS color for your requrieWeight201.8gSensitivity:111dB±3% Impedancel150ohms ... to sell the world currently.2.Compared with the ear mai , because of adopting the technique of DSP ... .c. Working light: show on working condition in red color.d. Volume control Button: press top is increase ...