ITEM NAME:Digital Vacuum Pressure Gauge Pressure Gauge Hydraulic Air Compression Gaug M7O2 Digital Vacuum Pressure Gauge Pressure Gauge Hydraulic Air Compression Gaug M7O2 average measurement: gas Sensor Type: Silicon Semiconductor Sensor precision: +/- 1% F.S temperature error: +/- 1.5% F.S pressure limit: 1.5 times the full range of working pressure working temperature: 0 ~ 45 Celsius Storage temperature: -10 ~ 75 Celsius dimensions: 64mm diameter, 27mm thickness, (including rubber sheath diameter 72mm, thickness 35mm) connection pressure: G1 / 4 Power tool: 3.0VDC (2 * 1.5V 7 battery