Putwo Speaker for Mobile Device - Retail Packaging - Black Portable bicycle speaker with easy to pair Bluetooth technology and a patented expansible resonator that delivers high signal to noise (s/n) ratio and wide range of audio frequency to enhance your music experience while cycling. Connect wirelessly via Bluetooth music players, including Apple iPhone, iPad, iPod, Android, Samsung Galaxy, Sony, Motorola, LG, HTC any Android, Droid any Bluetooth enabled mobile Device and any devices with 3.5mm Jack. Built-in microphone and volume control that gives you the option of hands-free Phone call and plays music simultaneously.