VFD2515 audio spectrum analyzer support 32Hz-20KHz precise frequency sweep, and make reasonable channel within the range of 10Hz-20KHz. VFD sound level meter display flip function, 16-level brightness adjustment. The spectrum of main landing speed, hold time and descent speed can be adjusted individually. With display and bottomless display mode, processing. Make the signal display richer. Using a professional constant current driver chip with blanking, the LED light has no problem of light and dark flickering. Input : 5 V Type-C/12VDC Sleep current: 0.03A (5V) Working current: 0.3-0.8A (5V) Input channel: audio input x1 Pickup: silicon (jumper ) Frequency response: 300Hz-20KHz Input impedance: 50kOhm Dimension : 176x50x28mm MCU:STM32F103 Display resolution: 25 segments and 15 levels Function: Optional spectrum mode Clock Speed regulation Brightness adjustment Gain adjustment (internal/external) Material: pcb colour: black Package Contents: 1 x spectrum analyzers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.