Product Details  voltmeter easy installation & high accuracy 75% key component from well-know manufacturer ISO9001 & CE Feature *Dual-Slope integration A/D converter system *Ultra-bright LED display *Polarity: Automatic *Automatice zero reading for OV input *Low cost high accuracy *Can be re-calibrated by adjusting the calibration potentiometer *Connection cable (pigtail) included *Easy to install (DIY), snap-in/mount in panel *Ideal for auto, boat, industrial etc. * Certification ISO9001 & CE * Easy to read under the high lights (sunshine) * More than 70000 hour life * High quality component (LSI) and high stability * key components from well know manufacturers * Easy to use high accuracy Specification Digital display: 1999 4 digital Display colour: red blue green purple available LED Height: 15mm Operating temperature: 050 Relative Humidity: 20%80% Power supply: DC5V/AC9V/AC220V/AC110V Installation method: Inlay Installation size: (76+0.1)x(39+0.1)mm Dimension: (W)79X(H)42.6X(D)25.5mm Parameter  XL5135V Seriespower supply DC12V measurement DC voltage--voltmeter ModelFull measurementResolutionAccuracyInput impedanceLimit voltage inputXL5135V-1±199.9mV0.1mV±0.3%+1 Digit100MΩ±10VXL5135V-2±1.999V1mV±0.3%+1 Digit100MΩ±35VXL5135V-3±19.99V10mV±0.3%+1 Digit10MΩ±250VXL5135V-4±199.9V100mV±0.3%+1 Digit10MΩ±400VXL5135V-5±300V1V±0.5%+1 Digit10MΩ±500V  -We are one of the biggest supplier of digital meter for welding machine.  -Each product was checked through rigorous test equipment  -Each product has ID of product for tracking and search. We use high quality and reliable components. The chip from Siemens, Panasonic, Microchip and so on. Connection from phoenix, Thomson. Potentiometers from Bourns, Tocos and others.  We have high efficient testing equipment: FLUKE , KEITHLEY , HP, HIOKIand on. And YAMAHA of Production equipment. Our daily production capability is 3000-4000pcs.  In 2001, we have got ISO9001 Quality Management System Certification. We are an excellent member unit of Xi'an Metrological Measuring Institute. Our products have passed CE authentication. We can produce environmental products which meet RoHS standard. Our factory promises: reasonable prices, short production time and satisfactory after-sales service. We hope to cooperate with more customers for mutual development and benefits. We welcome the buyers to contact us.