This stylish Bulova bluetooth speaker by Fanstereo comes in at lightweight 0.25lbs but packs powerful sound capabilities with High Precision Audio (HPA). Also the smallest (only 3.5in.) yet loudest handheld bluetooth wireless speaker in the world, it will allow you to enjoy music anywhere, anytime with friends and family. Has a micro SD slot for playing music on the go. Play time 18 hours depending on volume. Wireless communication range up to 100 ft. without obstacles. Adapter micro USB port, DC 5v-500mA.