Biking instead of driving to work is smart. So is the Ellipse Smart Bike Lock. It keeps your bike secure without the need for keys, unlocking over Bluetooth when your phone is in range, or via a hidden touchpad. A built-in accelerometer can send you alerts if your bike is disturbed and alert others should you crash, and a built-in solar panel keeps the battery charged up. Dual locking mechanisms — one on each side — provide the last leg of security, making a thief cut through the 17mm thick steel bar twice to make off with your wheels.