Function Introduction:
VU1-PRO is a multifunctional device that integrates VU meter and RCA/XLR switcher. While switching audio signals, you can enjoy the visual experience brought by VU meter. It supports two audio signal processing methods, DB and AGC, and provides super wide input signal range up to 5Vrms. At the same time, it supports manual and quick adjustment of pointer swing sensitivity and range, and you can quickly set VU1-PRO to work in the best working state. VU1-PRO also has a built-in microphone pickup, no need to connect an audio cable. You can also enjoy the effect of the VU meter beating with the rhythm of the music.

Product Parameters:
- Audio input/output: stereo RCA or XLR
- Power-down setting save function: support
- Backlight brightness adjustment: support
- Microphone pickup function: Built-in microphone pickup, you don’t need to connect an audio cable. As long as there is sound
- Audio switcher: support RCA to XLR or XLR to RCA, mutual conversion
- One-click filtering of environmental noise: support
- Working voltage: DC 5V 1A and above
- Backlight type: Tungsten lamp. Working voltage 9-12Vdc
- VU meter diameter: 35mm
- Machine size: 150*115*44(mm)L*W*H
- Net Weight: 550g

ACG & DB Mode Description:
- AGC: The automatic gain mode is actually a compression mode. The function is the same as the professional VU driver board. It is a square root audio compression. When the volume is low, the compression is very small. The larger the volume, the greater the compression. The maximum is 3 times compression ratio. So in this mode, the pointer beating is more suitable for daily use. It is more consistent with human perception.
- DB mode: No compression. The pointer and the volume are 1:1. For example, it is not actual data. If the input voltage is 0.1V and the pointer swing angle is 10 degrees, then input 0.5V and the pointer will swing 50 degrees. This mode is more suitable for situations where you need to know the true level.

One-Click Filtering of Environmental Noise:
First play the music normally. Use the GAIN knob to set the pointer in the appropriate range, that is to make the pointer jump about 50% to 90% of the dial, and then pause the music. Long press DB/AGC button for 3 seconds and keep it. Until the 4 LED lights (MIC/LINE/DB/AGC indicator lights) light up, release the button to enter the environmental noise filtering function. The system will set a fixed threshold according to the collected actual environmental noise intensity, filter out the highest noise, and the time will last about 3 seconds. When the setting is completed, it will automatically exit the setting. 2 LED lights of the 4 LED lights will turn off, indicating that the setting has been completed. Just play the music again at this time. Note that before this function is exited, in addition to the real environmental noise, do not artificially make other sounds, such as talking, or playing other music or moving the machine will affect the setting inaccuracy.

The environmental noise filter function can only filter up to 50% of the maximum value of the pointer swing, and the noise beyond this position cannot be filtered. It is recommended to adjust the GAIN to reduce the swing range of the hand.

Once the environmental noise filter function is set, it will work in both LINE and MIC modes. If you plan to restore the default value without powering on, you can adjust GAIN to the minimum and then enter the environmental noise filter function again.

It should be noted that the setting value of the one-key filter environment noise function does not support power-off saving. After power-off, (referring to unplug USB power supply), it will restore the default value when it turns on again. In the soft shutdown state, it is only shut down by pressing the key if the USB power cord continues to supply power, the set value can be temporarily stored in the memory.

Package Included:
- 1 x VU1-PRO
- 1 x Screwdriver
- 1 x USB Cable

Note:
- Other items pictured are not included, for demonstration purposes only. Thank you for your understanding!

FAQ:
Q1: The Meter's pointer is fuzzing, even when there is no music.
A1: Resolution 1: The USB power supply is of poor quality. The power supply has large ripples and causes great interference. It is recommended to change to a better USB power supply.
Resolution 2: VU1-PRO and player's audio source share a USB power supply. This causes common ground interference. Please be sure to supply VU1-PRO separately.

Q2: The backlight brightness of the two meters of the machine is not the same.
A2: VU1-PRO uses a tungsten bulb as the backlight of the meters. During transportation, the tungsten filaments in the bulb may become entangled and shortened due to vibration. The internal resistance becomes smaller. Therefore, the brightness is different. You can manually adjust the backlight of the two meters by adjusting the resistance of the backlight brightness on the rear panel of the machine.

Package: Normally we use the standard exporting packaging. We also can according to clients' request .

 Shipping : 

1. By Couriers: DHL, UPS, FEDEX, TNT are the main courier  we are co-operating at present.

2. By Air: Delivery from the Shanghai airport to customers’ destination city air port.

3. By Sea: Delivery from the Shanghai sea port .

Q1. Can I have a sample order?

A: Yes, we welcome sample order to test and check quality.

Q2. What about the lead time?

A: Samples arrived often need 3-5 days.

Q3. Do you have any MOQ (minimum order quality)limit?

A: Low MOQ, 1pc for sample checking is available.

Q4. How do you ship the goods and how long does it take to arrive?

A: We often ship by DHL, UPS, FedEx or TNT. It usually takes 3-5 days to arrive. Airline and sea shipping is also optional.

Q5. How to proceed an order?

A: Initially, let us know your requirements or application. Besides, We quote according to your requirements or our suggestions. Thirdly, customers confirms the samples and places deposit for formal order. Finally, We arrange the production.

Q6. Is it acceptable to print my logo on the product?

A: Yes. Please inform us formally before our product and confirm the design firstly based on our sample.

Q7: Do you offer guarantee for the products?

A: Yes, we offer one-year warranty for our products.

Q8: How to deal with the flaw?

A: Our products are produced in strict quality control system and the percent of pass is often maintained over 99.8%

Please do not hesitate to contact me if you need any further information

Whatsapp/Tel/Wechat: 8619902906050

Web: 

Address: Room 303 Building 2,Youpin Cultural and Creative Park,Zhangkeng,Minzhi Street,Longhua District,518131,Shenzhen,China(Mainland)