Superex&reg; 6Watt Powerful Sound Dual-Channel Stereo Bluetooth Speakers with Bass Booster Touchpad Control Portable with TF Card Optional Support AUX Line-in - Black Portable Stereo Bluetooth Speaker with 2 x 3watts rms digital amplifier and Bass Enhance Technology Huge 1200mah rechargeable Lithium polymer battery provides up to 12hrs playtime from a single charge Reliable Bluetooth range of up to 15 metres (50ft) and highly responsive touch sensitive controls Inputs for 3.5mm AUX mean that will work with non Bluetooth devices by using the 3.5-Aux cable or play tracks directly from a micro SD card. Intelligent voice guidance makes navigation easy. Touch Control adjust Key:keep press "+" can make volume higher,keep press "-" can make volume down,press "Call" can play/pause music or hang up a phone call. Built-in speakerphone allows you talk through the speaker when receiving a phone call.