Polk Audio BITB-A Boom Bit Black Wireless Micro wearable Bluetooth speaker that clips securely to your clothing, safely balancing your music with your immediate surroundings Durable enclosure keeps the tunes on full Blast for any adventure Spring steel clip slips securely to any apparelfasten it to your shirt collar for optimal performance Take hands-free calls and Talk safely on any adventure whether on a bike, in the car or wherever the journey leads Standard USB with hinged cap for a quick and easy on-the-go charging