NUX B-7PSM is a wireless personal in-ear monitor system with automatic RF environment scan, 5.8GHz interference-free broadcasting frequency, and 24-bit / 40 kHz high-quality STEREO audio transmitting. From any position. On any stage. Hear every note in detail with NUX B-7PSM in-ear monitoring system. Designed for band rehearsals and live performances, prioritizing the best possible STEREO experience. While B-7PSM may not be suitable for personal silent practice. Since you maybe hear some distortion and hiss sound in personal silent practice. Please consider about this issue before purchasing.