COSTA Wireless Microphone System 2.4G This wireless microphone adopts 2.4G frequency, has stable signal transmission, and an effective range of 30 meters without obstruction. It is compatible with DSLRs, mirrorless cameras, smartphones, PCs, and more. COSTA offers many features, including noise and background sound reduction, adjustable Db (decibel level) for high or low sound levels. COSTA sound monitoring can be done in two ways on the RX (3.5mm) and TX (Type C) ports, which can also function as output (3.5mm on RX) and charging (Type C). COSTA also comes with a Charging Case (Powerbank), so you don't need to worry about running out of battery for the mic. The charging case is ready to supply power anytime and anywhere.