Description: 1. 3-channel stereo personal monitor headphone mixer 2. The product has the ability to customize personalize the main music as well as the musician's voice and instrument input, making it an effective and versatile monitoring device. 3. All three input channels are output by 1/4 and 1/8 (6.35mm and 3.5mm) headphone jacks through various level controllers. The microphone channel and the output of the device are connected to the ground switch to eliminate current ground interference sound. 4. The tone is pure and natural, the reduction degree is extremely high, the comfort sound, and the volume can be adjusted (treble, midrange, bass). 5. Suitable for live bands, performers, drummers, church choirs, studio musicians and singers etc. Specification: Max input level: -20 dB XLR, +40dB line, +15dB instrument Inst.input impedance: 50K ohms Inst.output frequency response: 10-30kHz+/-3 dB Output impedance, hdphn: 10 ohms Output impedance, inst: 2 ea; 100 ohms balanced Gain: 20 dB 1/4", 50dB XLR hdphn freq. response: 20-20 kHz s/n ratio: 90dB Power: 9-16VDC 1/4 TRS stereo / mono listening input. The XLR microphone enters w/ pass-through. 1/4 TRS stereo instrument input. 6.35mm / 3.5mm stereo / mono output. Size: approx. 130x85x38mm/5.12x3.35x1.50inch Package Includes: 1Piece Personal Monitor Station Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor