Detailed Description  earphone/stereo earphone/mp4 earphone/MP3 Metallic Earphone/Earphone Earphone  1) frequency response: 20hz-20 khz  2) speaker impedance: 32Ω  3) driver unit: 10mm  4) rated power: 2mw  5) power handling capability: 10 mw  6) cable length: 1.30 m  7) sensitivity: 100db  8) microphone: 4.5*2.2mm-42db+/-3db  9) plug: 3.5mm stereo  10)ear bud made in metal and crystal material  11)it can make very high quality sound  12)compatible with mp3, mp4, ipod, iphone  13)Weight: 15g (with wire)