Yellow Jacket 49017 - Replacement Gauge Replacement Gauge Battery Life: 2 years for continuous operation without backlight Zero pressure function Warranty: one year Auto-off: 10 minutes3-1/8' backlit LCD gauges provide easy-to-read accurate measurements for system pressures. This gauge is capable of handling maximum pressures of 800 psi, so there are no worries about over-pressurizing. Pre-programmed with 21 of the most common refrigerants, the YELLOW JACKET Digital gauges will provide clear, swift and accurate pressure measurements for all your system applications.