... off, syringe is improperly installed, setting error, AC power has been pulled out, low battery and so on. ... pump)Operating powerAC100~240.0V, 50/60Hz, Power:≤30VAInternal rechargeable battery: DC 11.1V,capacity≥1600mAh. The device could ... pressure860hPa~1060hPaSafety levelClass II with insulated enclosure, internal power supply, BF-type continuous normal running equipment.IP gradeIPX1Dimensions280 ...