With the recent hefty rises in the price of season tickets, switching to commuting by bicycle is becoming more and more appealing — free, no delays and of course no emissions. If safety is the one thing putting you off retiring your Oyster card, then that may be about to change because with the Cerevellum — a new digital rear-view display gadget for bikes — cyclists are given eyes in the back of their heads.

Cervellum may sound like some Latin term from a medical dictionary, but that would be entirely appropriate because as well as serving as a GPS system and digital rear-view display similar to those seen increasingly in cars, it’s also a heart-monitoring device. It isn’t attached to your arm or chest — in fact, it’s not affixed to the body at all, but the handlebars on a bike.

According to ProductDose, this all-in-one device has a 3.5-inch screen and 32MB of space to store your fitness data, as well as a 4-hour battery.

All this doesn’t come cheap at $299 ($152), but we suppose there’s some consolidation savings because you won’t have to buy three or four separate products for these various functions. Besides, we applaud anything that prevents the need for those nerdsome helmet mirrors and gets more people onto two wheels.