Samson's SM4 is a half-rack, 4-channel line mixer designed to easily integrate into any installation or commercial sound system. Perfect for fitness clubs, gyms, restaurants, night clubs and schools, the SM4 features a balanced microphone channel with 2-band EQ, voiceover priority ducking, stereo line level inputs, as well as Bluetooth® and Samson XPD wireless connectivity. So, now is the time to Mix It Up! Key Features: · Microphone input with 2-band EQ (balanced XLR-1/4 inch. combo) · Stereo line input (rear-mounted RCA, front-mounted stereo 1/4 inch. and 1/8 inch. [3.5mm]) · Bluetooth connectivity to wirelessly stream music · USB port for use with Samson XPD Series USB Digital Wireless Systems (sold separately) and phone charging · Voiceover control with priority ducking and variable hold time · Rear panel master volume control · Mono/Stereo output switch