This New bicycle turn signals with wireless technology connectivity front to back, Simply slide each sleek light cluster onto the adjustable clamps and you’re away…The super bright orange LED indicators are visible from the side so fellow road users will always know when you’re about to make a turn Left , Right , Stop , Brake Indication , Built in super bright LED lamps and built in rechargeable battery provide LED continued bright about 28 Hours , Controller about 40 hours of run time .