Over 20 units of the detector have been distributed for testing in various operational zones MOSCOW, September 11. /TASS/. Russian designers have developed an innovative acoustic drone detector that seamlessly integrates with a smartphone. This cutting-edge device is capable of detecting reconnaissance quadcopters and FPV drones, including fiber optic models that remain invisible to conventional detectors, according to a spokesperson from the Pobeditel training center, which created the product.