On-The-Go Wearable Speaker The Polk BOOM Bit is the worlds first truly wearable Bluetooth speaker that clips securely to your clothing & seamlessly integrates with how you move, safely balancing all your audio with your immediate surroundings. It features a durable enclosure, spring steel clip, speakerphone capability, & a standard USB (Universal Serial Bus) for on-the-go charging. Wearable Bluetooth Speaker A truly wearable Bluetooth speaker that clips securely to your clothing & seamlessly integrates with how you move, safely balancing all of your audio with your immediate surrounding Spring Steel Clip Attachment Slips securely to any apparel for a lock-&-stay fit during all of your adventures—fasten it to your shirt collar for optimal performance. Ruggedly Durable Texturized body & rubberized bumpers engineered for maximum durability anywhere. Built-in Speakerphone Take hands-free calls & talk safely on any adventure whether on a bike, in the car, or wherever the journey leads. Integrated USB (Universal Serial Bus) for Portable Charging Standard USB (Universal Serial Bus) with hinged waterproof cap for quick & easy on-the-go charging. Just plug the Bit into any USB (Universal Serial Bus) port whenever youre running low on power to get the charge you need to keep going. 3-Hour Battery Life At full charge the Bit gives you three hours of power at just over half volume—the preferred listening level based on its proximity to your ear. Easy-to-Use Control Buttons Turn up or lower the volume on calls or music & easily control all your favourite tracks with the Bits integrated control buttons for phone-free operation.