F4 4-Channel Multi-function Professional Bluetooth Live Streaming Mixer Features: 1. 2-channel signal inputs and 1 stereo signal input 2. 2 sets of main outputs (XLR balanced and 6.35mm); 1 set of auxiliary outputs and return jacks 3. 1 independent recording output and monitoring port 4. Low-noise, high-precision microphone preamplifier; clear and clean sound quality 5. Balanced XLR microphone inputs and balanced TRS line inputs; 3-band channel EQ 6. 48V phantom power; provides polarization voltage for inputs and facilitates connection of condenser microphones 7. Headphone monitoring jack 8. Quasi-logarithmic dual 10-segment LED level display 9. MP3 playback module (featuring an HD LCD display and USB port) 10. External switching power supply (AC 100–240V): offers flexible usage and low power consumption 11. 16 digital effects, selectable via push-buttons 12. Built-in Bluetooth module offering full compatibility with digital devices such as smartphones and tablets; connects directly via wireless Bluetooth without the need for audio cables. Specifications: 1. Power Input: AC 100V-240V, 0.2A 2. Output Level: +26dBu max 3. Common-Mode Rejection Ratio (CMRR): more than 75dB 4. Line Input Level: +24dBu 5. Frequency Response: 20Hz-20kHz 6. Microphone Input Level: +24dBu 7. Total Harmonic Distortion (THD): less than 0.01% 8. Noise: -80dB 9. Bluetooth Version: 5.0