The NUX B-7PSM is a wireless in-ear monitor system with automatic RF environment scanning, a 5.8 GHz interference-free transmission frequency, and 24 bit / 40 kHz high-quality STEREO audio transmission. This brand-new wireless system quickly finds a clear radio channel and automatically assigns it. The B-7PSM offers extremely low latency of less than 5.5 ms and has a range of 30 m (100 ft) when operating unobstructed between the receiver (RX) and transmitter (TX). (With obstructions, the range is approximately 10 m (32 ft). It's a super-lightweight, wireless, compact, and easy-to-carry system.

• Reliable Performance: The TX transmitter features a 1/8-inch TRS connector (which can be converted to a 1/4-inch connector using the included adapter) and transmits broadcast-quality audio signals to the compact RX via a 5.8 GHz digital transmission. The RX's clip design easily attaches to a shirt, belt, or guitar strap. Thanks to the latest automatic frequency switching technology, the B-7PSM performs reliably and stably on any stage.
• User-Friendly Setup: The user-friendly matching system makes it easy to use: Simply turn on both wireless units (TX & RX), and pairing is completed within a few seconds. Each wireless set has a unique pairing algorithm that automatically detects the other devices and configures their own IDs. The signal does not interfere with other wireless devices, including the Wi-Fi signal. (Recommended: Please keep a distance of 2 meters from the WiFi router for best results.)
• Precise Volume Control and Stereo Audio: Connect the TX to a live or PA mixer and turn on the TX (the LED indicator will glow GREEN). Then connect your in-ear headphones to the RX and turn on the RX to connect it to the TX. The LED indicator will glow solid GREEN. The unit is now ready to use. (Caution! Do not insert the in-ear headphones into your ears before adjusting the volume, as you may injure yourself if the volume is too high.) You can adjust the RX volume in 0.5 dB increments using the + and - buttons. The maximum volume is 0 dB, and the minimum volume is -64 dB. Pressing and holding the + or - button quickly increases or decreases the volume. The B-7PSM offers stereo audio transmission, making it ideal for use with professional mixing consoles to pan tracks on stage during rehearsals and live performances. The B-7PSM delivers premium sound quality with a dynamic range of 92 dBA and a frequency response of 20-19 kHz. (Note: Briefly press the RX's power button to return to the default volume setting. It may be too loud if the in-ear headphones are very sensitive. Please turn down the mixer's volume and then increase it gently. We recommend using headphones or in-ear headphones with an impedance of 16~32 Ohm for an optimal listening experience. The B-7PSM was designed for band rehearsals and live performances, with the focus on the best possible STEREO experience.)
• Mono Compatibility and Charging: Although the B-7PSM is a stereo IEM solution, you can also use it in a mono environment if necessary. Simply use a 1/4" mono to 1/8" stereo adapter (to split the mono signal from a 1/4" output into both channels of the B-7PSM's 1/8" stereo input), and you'll get a mono signal that can be heard on both the left and right channels. You can charge the RX and TX units using the rechargeable storage case or use the USB-C cable for charging. Both devices can be used while charging.