This tiny Bluetooth 2.1 controller is actually a jack of all trades device as it will control your phone, tablet or PC for gaming, multimedia control, remote camera trigger and even help find your keys -- via a free app -- ifyoulosethem.
You also lose the last 3 months of interest ifyou redeem them within the first 5 years of issue, but the series I savings bond would still be ahead of the average 5-year CD after just 12 months even with the penalty.