SoundMagic PL20 Product Features - Compact and portable design - Made by Aluminum cavity. - Suitable for MP3/MP4, CD, music mobile phone, stage monitor etc. - Very balance sound quality with deep bass, smooth mids and well defined highs and the experience is pure high fidelity. - Being an in-ear-design, the PL20 offering unparalleled comfort for long-term listening. - All material under "ROHS" - Ideal for your friends gift or for your own use - Come with carry bag, three pairs of silicon ear pads in S/M/L sizes, sponge ear pads,cable clip etc. SoundMagic PL20 Specifications Transducer type: Dynamic (9mm neodymium magnet) Operating principle: Semi-open Nominal frequency response: 20 - 22KHz Nominal Impedance: 12 Ω Sensitivity: 100dB+/-3dB at 1mW 1K Hz Maximum Input Power: 15 mW Rated Power: 2 mW Sound coupling to the ear: In-ear Cable: 1.2 m (9999.9% copper wire+fibre,TPE coat) Connection: Stereo mini jack plug 3.5 mm Weight: 51g SoundMagic PL20 is the Shenzhen Soundmagic Technology Development Co., Ltd one of the high quality products , and the same series of products are SoundMagic PL10 , SoundMagic PL50 , SoundMagic PL21 , SoundMagic PL11 etc.