Shimano have been offering gear and brake systems since many years now. They were the first company to offer a combined gear and brake shifter, commonly known now as STI (Shimano Total Integration) shifters.
This listing is for the 3 Speed Left Hand Lever only.
The Acera Shifter has a large window to show you the gear you are in and has a V brake lever built in. Please note this brake lever won't work with older style cantilever brakes.