Features:Design: Mini， Portable， Cool， Stylish，Magnetic LevitationFeatures: Magnetic Levitation Supports: Hands-free Calls， Volume Control ， LED Shinning， Bluetooth， Microphone Functions: Stereo， AUX Function， Songs Track Compatible With: PC， Mobile Phone， for PSP， MP5， Laptop， for iPhone， Tablet PC， for iPad Speaker: ��40 inner magnetic 4��3W * 1 + bassFrequency response: 90Hz-20KHzSensitivity: 80db �� 2dbDistance: 10mSNR: 80dBDistortion: 0.3%Size:72*72*85mmBattery: Built-in lithium battery 500MAH Function: bluetooth + Stretch + hands-free + touch screen