Features: 1) The core component is the use of the patented technology --- Attached ultra-small audio oscillator; 2) Super-cute "smile" creative designed; 3) The weights only 28g, lanyard hole left can be used as accessories to carry, there is no burden; 4) Standard trigeminal line configuration (one end is USB and 3.5mm line, the other end of the mini USB), can be widely with various computer / phone / ipod / MP3 / MP4 / PSP and other audio playback devices use; 5) Using the computer USB power supply, when there is no USB power, you can use a dedicated power line device, trigeminal line back on the line device using lithium battery. Specifications: 1) Rated Power: 2.5W 2) Oscillator Impedance: 4Ω 3) Frequency Response: 150Hz - 15KHz (depending on the resonance interface) 4) Operating voltage:3.2-5 .5 V 5) Working current: ≤ 0.5A 6) Dimension: ¢ 48 mm × 14.5 mm 7) Weight: ≤ 28g 8) Packing list: smile resonance speakers, trigeminal cable, manual