Parameter Description : The device has three gears: Effectively analyzes many automotive pressures including cylinder compression, intake manifold vacuum, and exhaust pulses. 1.Corresponding RAN red light : 15 to 500psi(34.5bar) 1V/100psi(6.89bar) Suitable for running cylinder compression tests. 2.Corresponding RAN green light : 15 to 50psi(3.45bar) 1V/10psi(0.689bar) Suitable for vacuum test. 3.Corresponding RAN blue light : 2.5 to 5psi(0.345bar) 1V/1psi(0.0689bar) Suitable for analyzing small pressures or pulses such as exhaust back pressure. Minimum pressure change response time> 2uS Operating temperature -10C - 60C Battery capacity 3600mA. (Fully used for more than 10 hours at a time). Charging instructions: Charging voltage: 3.7V, can be fully charged in 4 to 5 hours. When the device is charging, the charging LED will flash. Battery level display in 3 levels: 1. Sufficient battery: green . 2. Normal power: blue . 3. Low battery: red. Dimension:185mmx76mmx37mm. Weight:418g. (Note: It is recommended to charge when the battery is low). Packing List : 1 pc * JH APT-100 Host. 1 pc * Charging head. 1 pc * Charging line. 1 pc * BNC-BNC line . 1 pc * Connection hose. 1 pc * Extension connecting aluminum rod. 1 seversl * Small screw up/Small screw. 1 each * M10/M14/M16/M18 Adapters. 1 *Manual(U Disk). (Note:Be sure to use the original charger for charging.)