Features:100% brand new and high quality.Mini portable stereo speaker; enjoy your music everywhereFine stereo bass music sound qualityA variety of colors for you to chooseSuitable for 3.5mm audio device; such as smartphones; tablet and so onInstall two 7th dry batteries on the back of the product; then connect the product to the 3.5mm audio device; turn on the switch; and you can use it.Description:Material:PlasticColor:As the picture showType:3.5mm SpeakerProduct Size:85*45*30mmPower:2*0.5WCustom Logo:YesFrequency Range:180hz-18KhzPower Supply:2*7th BatteryShape:CylindricalPackage include:1*3.5mm speakerNote:1.1 inch=2.54cm2.Please allow 0.2-1cm error due to manual measurement. please make sure you do not mind before you bid.3.Due to the difference between different monitors; the picture may not reflect the actual color of the item. Thank you!