1， the output power: RMS 3W THD = 10%2， frequency response: 80 ~ 20KHZ3， FM frequency range: 87.5 ~ 108MHz4， the signal to noise ratio: ≥90db5， the speaker: 2 inches (diameter 52mm)， 4 ohm6， store， download: USB data cable direct download，， no external card reader7， Bluetooth connectivity distance: ≥10M， with hands-free function8， Power Input: USB power cablePackage Contents：1 X Bluetooth Speaker1 x usb Charging Cable