Specifications:Surround stereo, brings you excellent listening experience.Support TF card and U disk playback, convenient for use.It also is a flashlight, long light range and low power consumption.This is a multifunctional bluetooth-compatible speaker, perfect for outdoor sports, such as hiking, running, mountaineering, etc..Portable and lightweight, easy to carry.Item Name: bluetooth-compatible SpeakerMaterial: PlasticLED Beads: 3W, 500m Light Range, 100000-hour Service LifeSpeaker: 40mm, 16 CoresBattery: Lithium Battery (Included)Functions: Lighting Function, Alarm Function, MP3, FM Radio, bluetooth-compatible Speaker, bluetooth-compatible Call, Line In Function, Mobile Bank Function, Support TF Card/U Disk (Not Included), Reset Key Function, Battery Replacement Function, Battery Anti-reverse Connection ProtectionFeatures: Multifunctional, Portable, Easy to UseSize: Diameter: 5cm/1.97", Height: 14cm/5.51" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x bluetooth-compatible Speaker1 x USB Charging Cable1 x Line In Cable1 x Bicycle Strap1 x User Manual