Speaker Impedance: 8 ohm Speaker Output: 3 W Max: 5W frequency Range: 400Hz~1,200Hz S.P.L: 88+/- 3dB - Update: 2007-07-23

Speaker Impendance: 4 ohm Speaker Output: 3 W Max 5 W Frequency Range: 450Hz~950Hz S.P.L: 92dB - Update: 2007-07-23

The i-POD Speaker is designed for i-POD series and other portable device that has the 3.50mm Audio port. Build-In IC module Amplifier to amplitude Audio sound with 2W+2W power output. - Update: 2007-07-16

The NT-002 Supper Mini Speaker is designed for mobile Phone, PDA, MP3, MP4, Potable CD Player, Notebook, Gameboy or other potable3C device that has a 3.50mm Audio Headphone socket. - Update: 2007-08-09

The NT-001Supper Mini Speaker is designed for mobile Phone, PDA, MP3, MP4, Potable CD Player, Notebook, Gameboy or other potable3C device that has a 3.50mm Audio Headphone socket. - Update: 2007-08-09