June 10, 2008  Taiwan – Kingstate Electronics Corp. has released its bullet-style in-ear earphones featuring 10mm driver units that support 100Hz to 500Hz frequency range with less than 2 percent THD or 500Hz to 18kHz frequency range with less than 0.5 percent THD.

The earphones feature 16ohm/32ohm impedance, 1mW input power rating, 10mW maximum input power, 90dB ±4dB output SPL at 1kHz sensitivity and 126mV voltage input.

The in-ear design of the unit allows noise isolation for rich stereo-sound quality. It is compatible with any device that has a 3.5mm headphone jack. 

link:www.electronics.globalsources.com/gsol/I/Wired-earphone/a/9000000097992.htm