Product Introduction 1. Digital display chip, LCD display screen, the test is more accurate, more reliable, and cost-effective. 2. Four test units: PSI, BAR, KPA KG 3. The button battery can be replaced. 4. Streamlined appearance design, more exquisite. Specification: Range:0-150PSI or 0-10 Bar or 0- 10 Kgf/cm* or 0- 1000 Kpa Display:21 * 10mm LCD display Power:LR44 button battery Operating temperature:-5 ~50C Reduce tire wear andextend tire life Increase fuel efficiency Improve vehicle handlingand safety Range:0-150PSI or0-10Bar or 0-10 Kgf/cmor 0- 1000KpaLCD Light demonstrationAutomatic shut-off. Engineering plastics shell Helpful Hints: 0 Press the ON/UNIT/OFF button. Wait for 0.0 PSIor 0.00 Bar or 0.00 Kgf/cm2 or 0 Kpa display andbleep sound. Place the nozzle of the gauge over the tyre valve. Pressfirmly toensure good seal and prevent air secaping. Hold gauge on the valve until the readingon the LCDdisplay locks. Remove the gauge quickly from the valve and readpressure. To retake the reading simply place the nozzle over thetyre valveagain and repeat. Gauge will automatically shut off 20 or 60 seconds afteruse. Gaugecan be manually turned off by holding theON button down for more than 3 seconds. In order to get a good seal,please put the tires air nozzle was up or off to the side. Its best when the nozzle is ar ound the 6 or 7 oclockposition So that you can firmly press the gauge straightdown. This means you have to crane your head a bit toread the digital measurement, but the important thing isto be able to press down straight hard onto the tiresnozzle This product does not contain batteries. If you receive the product, the product does not work, there is no battery inside, you need to buy a 3*LR44 button battery and install it before you can use it. Packing list: 1*Digital tire pressure gauge (TG105, TG205, R-6802 optional)