DC Bluetooth Wireless Mini Tube Speaker - Batman Features: - FM Radio - Bluetooth Wireless - USB Charging - USB Input - SD Card Reader - AUX Input - Crystal Clear Sound Specifications: - Bluetooth /USB/SD/AUX & FM Radio - Multifunctional decoder chip - Supports SD card (Up to 16GB) - Built-in rechargeable li-battery - Mini USB recharge and audio input - Output: 4", 3W, 3 Ohms - Signal and noise ratio:?80dB What's in the box Speaker