If you record audio on the road and need more convenience when connecting your mics to your computer, Rode's SC3 will definitely come in handy.
It is a high-quality 3.5mm TRRS to TRS adaptor, which enables you to connect your smartLav mics to 3.5mm TRS devices (cameras and audio recorders). For simplicity, gold-plated contacts are colour-coded, with the grey one indicating the TRRS input.