Cincinnati-based Valentine Research designs, manufactures, and sells the Valentine One radar-and-laser detector directly to drivers. President Mike Valentine has been engineering radar-warning products since the original Escort Radar Warning Receiver in 1976, and the company still repairs its detectors by hand at its Cincinnati factory, keeping parts for units built since the early 1990s. Its signature innovation is the Radar Locator, which uses directional arrows to show whether a threat is ahead, beside, or behind the vehicle.