Egg Style Mini Portable LED Light Bluetooth Stereo Speaker Features: Support hands free call Automatic Bluetooth connection for again use Can be charged by micro USB port Best choice for promotion gifts Wirelessly-play music through your bluetooth mobile phone With TF card slot, read MP3 format audio file from TF card With 2 music player keys--"Next/Previous" (Press the button for longer can control the volume) Up to 10M free wireless transmission Link the Speaker with PC or laptop via the connecting 3.5mm plug audio and USB cable Specification: Design : Portable Supports :Handsfree, Bluetooth, Microphone, Volume Control, TF Card Music Playing Functions: AUX Function, Stereo Connection : Bluetooth Material : ABS Interface :3.5mm Audio, Micro USB, TF Card Slot Power Source : USB, Battery Charging Voltage : DC 5V Power Output :2W Battery Types: Li-ion battery Parameters: Bluetooth Version :V2.0 Transmission distance :W/O obstacles 10m Impedance :32 ohms Frequency Range :2.402-2.480GHz Microphone : 36mm