Specifications Balance Armature Earphone 1, High class metal earphone 2, Single, double or multi-drivers 3, OEM is accepted High Class Metal Single Double Balance Armature Earphone 1, Can be used for iPod/iphone/MP3/MP4 player. New and Hot, Feel the sound difference with vibrant bass,vivid mid-range; 2, Special design, colorful, sporty 3, Advantage price and high quality for mass purchase 4, High quality and powerful sound 5, Beautiful pakage for your retail 6, OEM service provided, we can print your LOGO on the earphone. Specifications: Speaker: Single/multi balance armature speakers sensitivity: 105dB+3dB Impedance: 22Ω Frenquency response: 20-20kHz Cable: 1.2m Plug size: 3.5mm Power: 10mW Max Output Power: 20mW Level difference of L-R: ≤3dB at 500Hz-1000Hz Distortion less than 5% at 1KHz 2mw Plug Type 3.5mm Golden Plated Colors Green, red, white, yellow