 The officer only needs to match speed with a target vehicle, press the "BC" button on the handlebars, and the speed is visible for later reference.Optional equipment available through BMW includes electrically operated racks for mounting shotguns or rifles, as well as holders for nightsticks, flashlights, radar or lidar guns, citation books, and radio antenna mounts.Many of these items are also available from aftermarket manufacturers or may even be locally made.