The Radians Inc. R3700, commonly known as the R-3700 Bluetooth Quad Mic, is an advanced electronic sound amplification earmuff embedded with Bluetooth wireless technology by Radians. This product stands out with its four independent, spatially arranged microphones, providing an immersive full surround sound experience. It specialty lies in amplifying low-level sounds while simultaneously compressing sound levels that surpass safe limits.Another noteworthy feature is its compact folding mechanism. This makes the device easily portable and efficient to store. The fully adjustable headband of the R-3700 ensures a comfortable fit for every user. It also includes an LED on/off indicator light, which effectively prevents inadvertent battery drain.This remarkable device can wirelessly pair with most modern smart devices, extending its usability. It is designed with a sleek black/gray finish and boasts an impressive 24 dB NRR.