Mini portable Wireless Bluetooth Speaker with Colorful LED Light and Build-in Mic support handsfree calling function.Support SUB(U Disk) MicroSD TF Crad MP3 PlayerTechnical Parameters Speaker Type: Portable Bluetooth speaker Bluetooth Version:V2.1 Power supply: DC 5V, lithium battery (520mah) Effective power: 3W SNR:> 95db Transmission range: Up up to 10 meters without obstacles.(Walls and buildings may affect signal transmission.) Universally compatible speaker that's extremely easy to use,Bluetooth speaker Compatible with your iPhone, iPad, Samsung Galaxy, HTC and any other Bluetooth Enabled mobile device. How to pair with the bluetooth devices: 1.Move the power button to on to enter pairing status,the speaker will report"bluetooth mode" 2.Enable the Bluetooth function of the device and search for available Bluetooth devices, then select this speaker from the search results. 3.support music play or pause,volume +/-long press the volume button to adjust the volume). 4.Built-in microphone handsfree calling,Voice prompt available in English.press the call button once to answer the call,long press the call button about 2s to reject the call.Press the call button twice to redial the last phone number. Packing Include Bluetooth Speaker *1 Mircro USB Charge Cord *1