Feature: 1. Multiple Functions: With rich parameter settings and convenient remote control function, all setting parameters can be saved, built in MIC pickup module. 2. RCA and XLR: Support linear RCA and XLR terminal input and output, can output to other equipment, such as power amplifier, computer or recording equipment. 3. VU Mode: Divided into 2 sets of stereo display, corresponding to the left and right channels, easy to monitor, can be independently closed swing. 4. EQ Mode: spectrum mode, 4 VU meters will display different frequency values, 100Hz, 1KHz, 3.3KHz, 10KH, convenient to check the frequency amplitude. 5. Standard Size: All aluminum alloy shell, standard 2U chassis size, easy to put into any standard cabinet and other equipment combination, strong practicability. Specification: Item Type: 4 Way Analog VU Meter Model: VU4 Material: Aluminum Alloy Input and Output Port: RCA, XLR (2 sets of XLR stereo) Monitoring Frequency Range: 20-20Khz (VU mode), 100-10Khz (EQ mode) Input Impedance: 50K??, high impedance has less effect on input audio and can be ignored Support Audio Signal Source: Computer, mobile phone, decoder, CD, DVD, player, etc. Display Brightness Adjustment: Support 4 level adjustment Working Mode: VU standard mode, EQ spectrum mode. Remote Control Function: Support Hand Swing Range Gain: 3 levels of gain adjustable, -3dB, 0dB, +3dB (only adjust the hand swing range, does not affect the source audio signal) Power Off Setting Data Saving: Support Signal Source: 1 set, 2 set of LINE IN signal or built-in microphone pickup Remote Control Battery: 1.5V AAA x 2 (battery not included). Package List: 1 x VU Meter1 x Charger1 x Remote Control1 x User Manual Note: 1. Do not connect the speaker output of the power amplifier to the VU4. This will burn the level meter.2. If other power supply is used, it must be 12VDC direct current with a current of at least 1A.3. In EQ mode, if the needle swing is too large. It is recommended to lower the volume of the player appropriately.4. When the machine is out of the factory, it has been debugged in VU mode by default. GAIN=0dB, when the pointer of the meter points to the 0dB scale on the dial, the input audio level is 0.775RMS 1KHz. If you want other voltage standards, you can recalibrate yourself. Adjust the input level by adjusting the adjustable potentiometer behind the fuselage and let the pointer swing to 0dB.