You spent a lot of time picking out your bike. Why muck it up with a dollar-store bell? The Oi Bicycle Bell is a sleek accessory that replaces the traditional domed bell with a circular solution that both looks and sounds better. Hundreds of iterations were built to get just the right look and sound, the latter of which uses several pitch tones to ensure it gets heard. Installing it on your handlebar is a cinch — you just slip it over and tighten a single bolt — and it comes in five different finishes to make sure it matches your bike.