The Rode SC7 is a coiled adapter cable that lets you plug a mic or a wireless receiver equipped with a 3.5mm TRS output connector into the 3.5mm TRRS headphone jack of a smartphone or tablet. 
The SC7 is compatible with both iOS and Android devices and can be used with Rode microphones and wireless receivers, as well as mics/wireless receivers from other manufacturers. 
The cable is terminated with a black 3.5mm TRS right-angled male connector at one end for the mic and a gray 3.5mm TRRS right-angled male connector at the other for the smartphone. The connectors are gold-plated to protect against corrosion.