Mono LED indicator VU meter 12x 3mm LEDs Sound Meter - Assembling Kit Circuit - x2 pcs This is a single function indicator designed with discrete elements. The circuitry consists of a level indicator for low frequency signals. The LED indicator is mono type. Input signal is standard - 0.750 V (Low level). VU meter not work speaker output (work only line level signal - 0.500 to 1V). Input level control - trimmer-potentiometer. 12 LEDs (6x Green, 4x Yellow and 2x Red 3mm diffused LEDs). Supply voltage DC - 12 to 15 V (max 120mA), (You can use the car battery). Overall dimensions PCB 105x37mm (4.13"x1.45"). Components: 1. BC337 2. BC546 (BC547, BC548, BC549) 3. 1N4148 4. Green LED - 3mm 5. Yellow LED - 3mm 6. Red LED - 3mm 7. 10 uF  8. 1 uF 9. 620 OM (680 OM) 10. 1.8 KOM 11. 360 KOM  12. PCB 13. Circuit and wiring diagrams - 1 - 12 - 12 - 6 - 4 - 2 - 1 - 2 - 12 - 13 - 1 - 1 - 1 This item Assembling kit (NOT ready built) !!! This kit requires assembly and soldering !!! Before you buy this product, please make sure you can assemble it !!! This price for one piece. Package Content: - 100% Brand New in original packing. - English and Bulgarian Instruction Manual. - 2x Mono LED indicator VU meter 12x 3mm LEDs Sound Meter - Assembling Kit Circuit. Shipping: - All items will be checked before packing. All items are new and of high quality. - We will ship within 1-3 business days upon receipt of payment, excluding weekends and public holidays. - We only send by registered mail or courier, with tracking number. - Delivery time is from 5 to 30 business days depending on the destination. Customer Services: - Please contact us, we will assist you in any way possible and aim to answer all emails within 24 to 48 hours.