Groupon has the PuTwo EB2 Bike/Cycling Portable Bluetooth Speaker on sale for $39.99 + FREE shipping!

Why this deal is hot:
Save 20% off -- that's $10.00 in savings!

What this does and why you need it:
Mount this Bluetooth wireless speaker to your handlebars while your smartphone stays protected in your pocket or bag. It features a built-in microphone for hands-free calling, has integrated playback and volume controls, a 3.5mm auxiliary input and a built-in rechargeable battery that recharges via a micro USB.