Specifications: Pressure test: gauge pressure Pressure test unit: Kpa; Mpa; bar; inHg; PSI. Pressure test range: 0 Kpa – 6000 Kpa Pressure test resolution: 1 Kpa Pressure test accuracy: +/- 0.5 %(FS)+ 5dgt Pressure overload limit: 10000 Kpa (10 Mpa; 100 bar;) Vacuum test: relative vacuum Vacuum test unit: Kpa; Mpa; bar; inHg; PSI. Vacuum test range: -101 Kpa – 0 Kpa Vacuum test resolution: 1 Kpa Temperature test unit: °C (Celsius), °F (Fahrenheit) Temperature test range: -40°C–150°C (-40°F–302°F) Temperature test resolution: 0.1°C (-40°C–99.9°C), 1°C (100°C–150°C) 0.1°F (-40°F–99.9°F), 1°F (100°F–302°F) Temperature test accuracy: +/- 0.5 °C + 2dgt +/- 0.9 °F + 2dgt Built-in 89 kinds of refrigerant NIST: According to American NIST standard Power Supply: 4 X 1.5V (SIZE.AA / LR6) Battery not included Dimensions: 170*110*50mm weight: 950g Compatible with Refrigerant System: R11 R13 R113 R114 R115 R116 R12 R123 R124 R125 R1270 R134A R14 R141B R142B R143A R152A R170 R21 R218 R22 R227EA R23 R236EA R245CA R245FA R290 R32 R401A R401B R401C R402A R402B R403A R403B R404A R404B R405A R406A R407A R407B R407C R407D R407E R408A R409A R41 R410A R410B R411A R411B R412A R413A R414A R414B R415A R415B R416A R417A R418A R419A R420A R421A R421B R422A R422B R422C R422D R423A R424A R425A R426A R427A R428A R50 R500 R501 R502 R503 R504 R507A R508A R508B R509A R600 R600A R717 R744(Co2) R1234 Package Includes: 1x HVAC Digital Manifold Gauge 1x User Manual (in English) 2x Temperature Clips 3x Test Pipes 1X Suitcase (Battery not included) Main Features: 1.High -precision measurement 2.Pressure display 3.13 Pressure Units (Psi. kg/cm2. 0z/in2. bar. mbar. Pa. inHg. mmHg. unHg. inH2O. ftH2O. cmH2o. kPa.) 4.Data Hold Function 5.Record mode Specification: Measuring Range: ±20.68 KPa/±2.999 PSi Measurement Unit: 13 kinds of units Accuracy: ±0.3% FSO (25°C/77°F) Repeatability: ±0.2% (Max±0.5%FSO) Linearity / Hysteresis: ±0.29% FSO (25°C/77°F) Measurement Rate: 0.5s Data Storage: