Mono LED VU meter 12x 3mm LEDs Sound Meter - Assembling DIY 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). Power supply (battery) is not included. Size of PCB 104 x 36 mm or 4.10 x 1.42 in. 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 !!! Package Content: - 100% Brand New in original packing. - English and Bulgarian Instruction Manual. - 1x Mono LED VU meter 12x 3mm LEDs Sound Meter - Assembling DIY Kit Circuit - x2 pcs. Shipping: - All items will be checked before packing. All items are new and of high quality manufactured by us. - 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.