A California Order to Install Ignition Interlock Device, also known as a "Called," is a court-issued mandate requiring drivers to install an ignition interlock device (DID) on their vehicle after being convicted of certain alcohol-related driving offenses. And DID is a breathalyzer-like device connected to a vehicle’s ignition that prevents the vehicle from being started until the driver blows into the device and registers a specified blood alcohol concentration below the legal limit. There are two types of California Orders installing Ignition Interlock Devices: Mandatory and Voluntary. Mandatory DID orders are generally issued by a court after a conviction for driving under the influence (DUI) or driving while intoxicated (DWI), and usually require the driver to install the device for a period of one to three years. Voluntary DID orders are generally issued by the Department of Motor Vehicles (DMV) after a driver has been arrested for DUI/DWI but not yet convicted, and require the driver to install the device for a period of three to six months.