The NUX B-2 PLUS is a pocket-size 2.4GHz wireless system that offers guitar players an easy solution to go wireless. Step on the latest NUX wireless transmission algorithm, 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 out the batteries. Upgrades from previous version NXB2: Narrower bandwidth (2Mb only) provides better anti-interference ability. Lower power consumption, longer battery time. (7hrs working per charge.) Auto Off: The TX will turn off automatically since there is no input signal for 10 minutes, then the RX will also turn off after another 10 minutes. To ensure guitarists get an easy to use wireless without WiFi interference, we use competitive components from Taiwan to make B-2Plus more affordable and even better! Specifications: Operating Frequency Band: 2.4 GHz Audio Quality 32-bit / 44.1 kHz Operation Range: Up to 15 meters / 60 feet line-of-sight (environment-dependent) Frequency Response: 20 Hz – 20 kHz Latency: Less than 5ms THD+ Noise: Less than 0.05% 1kHz @-10dbFS Auto-Off Mode: After 10 minutes without operation Built-in Battery Capacity: 3.7V/750mA (Transmitter & Receiver) Battery Life: Up to 7 hours of playing time Dimensions: 73(L) x 40(W) x 55(H) mm Weight: 57g What's in the Box?: B-2 PLUS Transmitter B-2 PLUS ReceiverRoH USB-A to 2 Micro-USB cable Quick Start Manual, Warranty and User License Agreement. User-Friendly Freedom NUX B-2 works like a guitar cable but offers wireless freedom. Setting up the system is simple: choose your channel on the Transmitter & Receiver, and B-2 is ready to go. AND MANY MORE FEATURES SEE OUR WEBSITE