Classic Mini Portable Bluetooth Wireless speakers in cylinder design offers great sound, which could support TF/ USB & talk via bluetooth & AUX, easily connects to your digital devices. Made of MBOM plastics. Perfect For Your Home, Office, Party, College, School Or Outdoor events as a brand promotion with your custom logo. Output power:3w, Working range: 10m, USB/TF Card Slot, Power voltage: 3.7V, Charging Voltage: 5V, Input Sensitivity less than 400mV, Distortion less than 0.5%.