Check the listing for details. NUX B2 PLUS 2.4GHz Guitar Wireless System Black. Color: Black, Condition: New. Listed at 79.00 USD. The NUX B-2 PLUS 2.4gHz wireless guitar system is a pocket-size design that offers guitar players an easy solution for going wireless. Featuring the latest NUX wireless transmission algorithm, the B-2 PLUS secures a better connection in a noisy RF environment. With the newly added Auto-Off function, you'll never have to worry about leaving the system on and draining the batteries. It offers 32-bit/44.1kHz high-definition audio quality, and has a comparable operating range of 60' (line-of-site) with less than 5ms of latency. Additional updates include a narrower bandwidth (2MB) for enhanced anti-interference ability, lower power consumption and longer battery time (it's USB powered and gives you up to 7 hours of play time per charge).