Promotional silicone earphone, used for ipods, media players, radio, CD, portable DVD and laptops.
Driver Unit:  Φ10mm 
lmpedance: 32 ohm
Sensitiviy: 105dB S.P.L at 1KHz
Frequency Response: 20Hz~20,000Hz
Rated power: 15mW
Power capability: 150mW
Cable Length: 1.2m
Plug Type: Φ3.5mm Stereo, gold-plated or nickel-plated