eCase via Amazon offers the Kmashi 3-in-1 Bike Headlight / 4,800mAh Power Bank / Bluetooth Speaker for $14.99. Coupon code "WPKK2CAY" cuts it to $13.99. Plus, Prime members receive free shipping. That's $36 off list, $3 under our January mention, and the lowest price we've seen. It lights up to 164 feet and features a Bluetooth range of up to 33 feet, built-in mic, waterproof design, and bike mount.