Speaker Size: Diameter 40mm x Width Approximately 8mm (Including Velcro) Reproduction Frequency Band: 20Hz to 20000Hz Maximum Input: 80mW Output Sound Pressure Level: 105±4dB/10mW at 1KHz Plug: Φ3.5mm/3P Mini Plug (Gold Plating) Weight: 27.5g (Excluding Extension Cord) Country of Origin: Made in Taiwan [Product Contents] Stereo Speaker x1pc. Adjustable Type Extension Cable x1pc. Velcro for fixing Speaker x1pc. Sponge for Height Adjustment x1pc. Low Sound Enhancement Ear Pad x1pc. Tying Band x1pc.