The Saramonic Blink 500 ProX B1 is a 2.4 GHz wireless system that delivers exceptional, broadcast-quality sound to cameras, recorders, mixers, and other 3.5mm input devices. The Blink 500 ProX is the next generation of the immensely successful, and much-copied Blink 500 Pro system. Combining the innovative features of the original Blink 500 Pro system with a 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, and 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 35 hours.