Item Type: Monitor Headphone Amplifier Material: Aluminium Alloy Input: 2x XLR Connectors, Balanced Output: 3.5mm Connectors Input Impedance: 20K+ Output Impedance: 10+ Per Channel Frequency Response: 20Hz-80kHz (+/-0.5dB) THD+N: 0.01% SNR: >90 dB CMRR: >50 dB Crosstalk: >40dB Normal Input Level: 2dBu Maximum Input Level: 6dBu Limit Input Level: 7dBu Maximum Output Level: 9.5dBu LED: Power Indicator (Green), Battery Control Indicator (Red) Green LED On: Voltage 7.3V Voltage Green and Red LEDs On Simultaneously: Voltage = 6.8-7.3V Red LED On: Voltage < 6.8V Battery: 9 V Alkaline or 8.4 V NIMH x 1 (Not Included) Standby Power Consumption: 300mW Maximum Operating Current: 90 mA Package List 1 x Monitor Amplifier 1 x Instruction Manual 2 x Screws 1 x Fixing Bracket 1MONITOR COMBO, LED INDICATOR: Stereo monitor headphones amplifier has a monitor combo that supports dual XLR inputs, stereo and mono switching. With dual LED power indicator, the battery status at a glance. 2DRUM OUTPUT: Monitor amplifier has a drum output, and the high power headphone output ensures that as the band gets louder and louder, you'll still be able to hear every nuance of your performance. 3EXPLOSION PROOF OUTPUTS: The stereo monitor headphones amplifier features explosion proof outputs with built in current limiters so that unexpected spikes in signal level won't hurt your ears. 4MONITOR MIXING: Dual XLR inputs allow 2 channel, mono or stereo operation with a convenient mixing function that allows two sources to be run into the unit for accurate inputs while playing; two controls, Level and Balance can be debugged. 5EXTRA LONG STANDBY: The 9V battery lasts for up to 12 hours or more and will last until your next program or studio recording session. Or, use the optional DC power supply as a reliable power source.