Pro 12Channel Audio Mixer Bluetooth USB DJ Sound Mixing Console Amplifier for Studio KTV.The product needs to be used with an amplifier！ Specification 1. Channel: 12 channels 2. Maximum input level of microphone: +24dBu 3. Maximum input level of line: +24dBu 4. Maximum input level: XLR+26dBu 5. Frequency response: 20Hz-30kHz±0.5dB 6. Max Input Power: 15W 7. THD+N: ＜0.01% 8. Crosstalk (1kHz): > 85dB 9. Noise (22Hz to 22KHz): equivalent input noise -122dbu residual output noise < -90dbu 10. Mono/Stereo channel EQ: High frequency broom type +/-15db 12KHz Low frequency broom type +/-15db 80KHz Mid-high frequency peak type +/-15db 2.5KHz 11. Mono XLR: 2PIN 2Kohm -60~+14dbu sensitivity TRS: tip 10Kohm -40~+14dbu sensitivity XLR: +48V Material: Metal+plastic Size（approx）: 51.6cm x34cm x3.7cm Weight: 5.9kg Package included 1 x Mixing Console 1 x Power Cable 1 x User Manual Note 1. Please allow a little error due to manual measurement. 2. Do not use this device near the TV radio stereo cell phone or other electronic device or it may cause noise. 3. Please use a soft dry cloth to clean the mixer. 4. Do not set any equalizer and level knob to the maximum position otherwise it may cause acoustic feedback and damage the speaker.