Professional compression tester for gasoline engines - LCD screen1、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.