Performance tested & certified accurate to ¡À1% (Relative Humidity Temperature 25¡ãC) with FOUR MEASUREMENT UNITS: 0 ~ 150 PSI, 0 ~ 10 BAR, 0 ~ 10 KG/CM2, 0 ~ 1000 KPA. METAL INTEGRATED CLOSED & STRAIGHT LOCK-ON AIR CHUCK: The dial and inflator body are designed of one-piece closure, avoid any leaking and measuring be more accurate; The thickened-designed pure alloy socket-style gas interface is high durable and convenient to use. Valve core controller helps to loose or tighten the tire valve core. LCD BLACKLIT DIGITAL SCREEN: LCD blue backlight digital screen displays the tire pressure, easy to read and use, no matter at day or night. MULTI USES: It¡¯s a digital tire pressure gauge to measure tire pressure, a pressure releaser by simply press the pressure relief button and also can be an inflator by connecting an air compressor. Available for most vehicles, motorcycles, bikes, balls, etc. POWER SOURCE: Power by 2 x LR03 AAA 1.5V required (Included). It can last up to 2 year.