ACOUTO VU Meter VU Meter Reverse Connection Protection Voice Control Prevent Burning LED Indicates Melody Light For Test Sound Level LED Indicates Melody Light

Feature: 1. DC voltage between 5V and 12V can be powered with reverse connection protection. 2. The VU meter is a voice‑activated sensor so there is no need to connect audio just power on the product it will flash when there is a sound. 3. The louder the sound the more the LED will light up from bottom to top. As the sound fluctuates the LED will flashing with the music. 4. Using an independent comparator circuit although the circuit is slightly more complicated the structure and principle are easier to understand. 5. Equipped with anti‑reverse connection protection diode which can effectively prevent the circuit from being burnt due to the reverse polarity of the power supply. Specification: Item Type: VU Meter Material: Plastic Size: Length 10cm / 3.9in x width 3cm / 1.2in; Lamp Beads: 5mm Round Head Fog-like Led Uniform and Not Dazzling (multi-color Optional); Power Supply: DC 5V-12V is Available the Board Comes with a Microusb Socket You Can Use the Corresponding Mobile Phone Charging Cable to Plug in the Power Supply and 2 Pad Ports Are Reserved for Users to Their Own Wires; Package List: 1 x VU Meter Note: The signal sensitivity is adjustable the on‑board adjustable potentiometer can be adjusted for about ten turns and you can hear a tick inside the potentiometer when you adjust it to the end counterclockwise to decrease clockwise to increase. How to use: Regarding signal input: The board comes with a microphone no need to connect an audio signal it can sense and receive an external sound source and control the blinking of the LED lamp beads. The disadvantage is that the sensitivity is not as good as the line input and it is easily affected by other external sounds. If you need line input this step is about the audio signal (for example the headphone power amplifier of a mobile phone or computer cannot be connected to the output of the power amplifier or the speaker) you can remove the microphone and the signal is introduced directly from the microphone. If the lights are on adjust the potentiometer counterclockwise to decrease) This connection is recommended.