Features: 1.Complete Set: Test kit is used for gasoline engine compression testing with 4 standard and special adapters, and 16in flexible hose gauge assembly with quick connector. 2.Accurate Measurements: Digital pressure gauge has an incredible 0.5 display resolution within 1% of accurate pressure in the 10?200 PSI range. 3.Clear Display: The wide backlit LCD screen displays large and clear numbers in 4 units. Automatically shuts off after 2.5 minutes of inactivity to extend battery life. 4.Bleeder Valve: Side bleeder valve allows to repeat the test without disconnecting the hose. Comes with a storage box for easy storage and carrying. 5.Professional and Durable: Compression tester tools are made with the steel and brass components, built for all day performance in the shop or garage. Specification: Item Type: Automotive Compression Tester Material: ABS Display Mode: LCD digital display Pressure Unit: Four units can be switched PSI, KPa, Bar , Kgf/cm^2 Measuring Range: 3-300PSI, 14BAR, 14Kgf/cm^2 Operating Temperature: -20 to 80 Battery: 2 x AAA batteries 1.5V 200mah (built in battery) Working Current: 3MA or less (with backlight); 1MA or less (without backlight) Quiescent Current: 5UA Applicable Models: Universal