The Saramonic 2.4GHz Micro Transmitter with Omnidirectional Lavalier for Blink 500 Pro RX, RXDI and RXUC is perfect for ENG, EFP, DSLR video, field recording and more! The transmitter features an omnidirectional lavalier microphone for clear sound capture, and it's small enough to fit in your pocket. It operates on the 2.4GHz frequency band for interference-free operation.