The Saramonic Blink500 ProX B4 is an incredibly easy-to-use, ultra-portable 2.4 GHz dual wireless lavalier microphone system for Lightning-equipped iPhones and iPads. Ideal for all types of mobile content creators, it delivers broadcast-quality sound for two people in video, streaming, and audio recording applications.Its sleek, compact dual-channel receiver plugs into your iPhone or iPad's Lightning port. Includes an RXDi receiver and 2 transmitters.