Features: Type: in-ear Impedance: 16 ; Sensitivity:92db/1mw Frequency: 20hz~20khz Max input: 10mw Patterns:12 kinds Connection: wired Length:1.2m Plug:3.5mm Accessories: earbuds(S/M/L) Attention 1. Please make a pause while listening to music to protect both your listenings and earphones 2. Please low down your sound a little bit for protection of the earphones. weight for 30pcs: 1.6kgs