: The best units combine RF Scanning (for active transmitters) with a Visual Lens Finder (a red LED light that reflects off hidden camera lenses).

When choosing a detector, prioritize these three features to ensure you aren't buying a "paperweight":

Electronic bug detectors—once the exclusive tools of intelligence agencies—are now widely available for anyone from frequent travelers to security-conscious homeowners. Whether you need a simple device to scan an Airbnb or professional-grade equipment for sensitive business meetings, the market offers various tiers of technology ranging from roughly . Where to Buy: Top Retailers & Marketplaces Online Marketplaces ( Amazon and Walmart )

, which can detect hardwired cameras that many basic RF scanners miss. Professional Equipment Dealers ( B&H Photo , The Spy Store UK