Nordstrand Digital Tire Inflator with Pressure Gauge and Lock-on Air Chuck Hose Rugged aluminum body with rubber sleeve Resistente cuerpo de aluminio con manguito de goma Maximum air supply pressure is 170psi or 12bar, works with any air compressor Presin mxima de suministro de aire es 170PSI o 12Bar, funciona con cualquier compresor de aire Inflador de Neumticos Digital de alta precisin Vlvula de liberacin de presin integrada High precision digital tire inflator , Easy-to-read back-lit LCD display Customers will need to change the battery according to the instruction supplied with the product. Here's the excerpt: 1. Remove the silver hexagon wrench screw from the back. This will allow you to take the entire top half of the gauge out of the rubber housing. 2. Be careful not to drop the ring that's behind the gauge. 3. Then remove two cruciform head screws from the back of the gauge. 4. Now you can carefully split the case and access the battery. 5. Slide the battery out towards the outer edge of the housing and replace it with a 3V CR 2450 battery. visualizacin LCD retroiluminada de fcil lectura Built-in pressure release valve