Original from DSZH!!!
FEATURES:
Switch between refrigerant pressure and vacuum.
Programmed with 88 refrigerant pressure and saturated temperature data taken from the latest NIST database.
Measuring Vacuum and shown in percentage.
Low battery indicator.Long battery life of 30 hours.
Show actual temperature,sub cooling,superheat,vacuum.
High resolution LCD with background lamp.
Low voltage DC 6V design.
2 way aluminum alloy manifold with diaphragm design.
Sensors: 2 pressure sensors and 2 temperature sensors.

SPECIFICATION:
Pressure units :KPA,INHG,KgF/cm2,PSI,Bar
Vacuum units:Torr,mmHg,Micron,%
Power:1.5V AA X 4=6V
Pressure measuring:actual pressure.
Temperature units:℉,℃
Measuring range: Vacuum:-101 Kpa~0Kpa
Proof prsddure:0 MPa~6 MPa
Refrigerant pressure:0 MPa~4 MPa
Sensor resolution: 1 KPa
Sensor accuracy:±0.5%
Overload limit: 100Bar,10Mpa
Operating temperature:-20℃~+60℃
Battery life: 30 hours
Sensor temperature range:-50C-150C(-58F-302F)
Temperature accuracy:<50C(+/-0.1C),>50-100C(+/0.2C),>100C(+/-1C)
Auto-off:15 min with disabling capability.