NTI Audio MR Pro Minirator, Analogue Audio Signal-Generator, With sine, pink and white noise, Delay test signal, Polarity test signal, Sweep signal for every frequency range, Cable test function, Impedance and power measurement, Phantom power test, Load independent output level, 512 MB Flash-Memory with USB terminal ( for storage of wave files and configurations ), Graphical back-lit display, Inputs: XLR and USB, Outputs: XLR and RCA, Operates with 3x 1.5 v AA batteries (not included), Including bumper, USB cable and hand loop, Separately available accessories: Belt bag, power supply and cable test plug, Optional PSU: Art.#240762#