Technical Specifications:

Transducer type      dynamic (9mm neodymium magnet) 
Operating principle  closed 
Nominal frequency response  20 - 22,000 Hz 
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/ left-sided straight cable,9999.9% copper wire+fibre,TPE coat
Connection               stereo mini jack plug 3.5 mm
Weight                     10 g 

Performance and feature:

PL13 has very good noise cancel effect, Achieve -25dB.  PL13 is suitable for MP3/MP4, CD, music mobile phone, laptop 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 PL13 offering unparalleled comfort for long-term listening. All material under "ROHS". 

Accessories:

Carry bag, three pairs of silicon ear pads in S/M/L sizes, sponge ear pads, cable clip etc. 

Optional color: black / white .