The Woozik Twist gives you the ability to use it as headphones or as a speaker! Use the Bluetooth function to connect it to your device and listen to your favorite music! Rather listen to radio? Then try the FM Radio function and check out your local station! If you have music or audio files saved on a micro SD card, insert into Woozik Twist (up to 32GB) which plays all MP3 sound formats. The Woozik Twist also has a AUX port if you decide to use a cable! Specifications: - Driver Diameter: 40mm - Frequency Response: 20-20,000Hz - Impedance: 32O - Sensitivity (S.P.L): 105dB S.P.Lat 1KHz - Microphone Unit: 6x5mm - Microphone Directivity: Omni direction - Microphone Sensitivity:-58dB ± 3dB - Microphone impedance:2.2KO -File Support: ALL Mp3 formats -TF Card Slot: Up to 32 GB -Battery: Built-in Rechargeable Battery Package includes: 1x Headphone, 1x Charging cable, 1x Audio cable