Features 1, Parameter 2,Cute and fashion rabbit design 3,Hi-fi amplifier and internal speaker brings you perfect music 4,Internal Li-ion battery, USB connector makes more convenient using 5,Special for digital products such as MP3, MP4, Notebook, CD and so on Parameter 1, Product size: 4.5x4.4x9.9cm 2, Speaker unit: Dia.36mm, 4Ω 2W 3,Output: 2W 4, Signal to Noise Ratio: 70dB 5, Frequency: 200Hz~20KHz 6, Degree of distortion: <0.7% 7, Sensitivity: 500mV 8,Audio Frequency: 3.5mm 9, Material: ABS & Silicon 10,Power source: Internal Li-ion battery, USB to DC 5.0V Operation instruction 1, The audio cable one end connect to audio device, the other end connect to its’ audio input 2, Turn on the \"On / Off” button on the bottom of soundbox for playing music. 3, To stop play music, turn off the On/Off button. 4,While the USB cable connected with the soundbox, it is charging the soundbox and internal battery at same time.