The speaker is equipped with a microphone, you can listen to your favorite music and videos without having to download your phone or tablet.the surface of this product is smooth and will not scratch your hands is a good choice for your family or friends as a gift.Steady and undistorted bass sound effect with stereo sound surrounding, which brings you wonderful music.You can share music with your friends anytime, anywhere.DescriptionInterface type: 3.5mm audio socket, connectionConnection mode: 20hz-18khzFrequency response range: 40Hz-20KHzOutput power: 10W + 3W * 2Signal to noise ratio: 65dBChannel: 2.1Power supply mode: 220VOperation mode: knobExtended storage: 32GBNumber of speakers: 3 protocol: 4.1Effective distance: 10MBattery capacity: no batteryPlayback duration: 24 hoursShell material: WoodBox material: WoodAppearance dimension: main box 200 * 160 * 220mm, auxiliary box 80 * 80 * 160mmProduct weight: 1.9Function: card insertionFunction: remote controlFunction: RadioDisplay: NoneSupported format: SD cardWhether there is radio function: noPlayback format: MP3Playback format: wavPlayback format: FLCSpeaker adjustment mode: knobSupport app: noColor: versionPackage List:1 * Set of Speakers (3 speakers a set)(Excluding other exhibits)Notes:1. Due to measurement, please allow an error of 1-3 cm.2. Due to different computer screens and monitors, the actual color may be slightly different from the picture.Thank you for your understanding!Connect everything on your device and let the party begin.