Easy and fast check of loudspeaker and sound systems without assembling effort. For testing a speaker box, you just need the Speaker Checker and a cable. The optimum tool for the sound engineer. Features: •1W output power (max.) •sweepable sinus frequency 90Hz - 9kHz •power supply with 9V block battery/rechargeable battery •switchable symmetric or asymmetric output •Speakon, XLR output connectors •aluminium case •stainless steel clip