We replying Save battery If not close . We will replace batteries 3?times daily.. Also it close automatically after 5 mintues and same problem Production problem All meters if closed then ON then come same number Alos cooltest 711 if closed then come normal number Why this device laying and showing zero and pressure inside 270 We checking leak by device Check leak need at least 30 minutes Device close automatically after 5 mints and return to zero If i close also come zero You say don't worry and it shuts itself off after 5 minutes. It's like saying stop checking for leaks or checking the car for more than 5 minutes. All global devices, when turned off and on, display the normal pressure number when restarted, but your failed device defends its failure and then says this is normal so that I do not demand my right

The quality of this product is great and the price is reasonable.