The Saramonic Blink 500 ProX B2 TX+TX+RX is a 2.4 GHz dual wireless system that delivers exceptional, broadcast-quality sound for 2-people to cameras, recorders, mixers, and other 3.5mm input devices. 2 clip-on wireless transmitters with built-in mics, two professional lavalier microphones, a dual-channel receiver, and an advanced portable charging carry case. Smaller and lighter updated design, less latency, more reliability, upgraded OLED displays with real-time metering, longer battery life, higher resolution audio signal, wider frequency response, higher signal-to-noise ratio, & more. While still being incredibly easy to use. The transmitter features a built-in omnidirectional microphone with an impressive sensitivity of -39dB & also allows you to transmit line-level signal or microphone-level wirelessly and provides plug-in power to microphones. Battery life of 10 hours. includes a 2000mAh carcase that provides an additional 2 and 1/2 full system charges for a total of 35 hours.