Do you include the calibration in the meter?

I bought a used unit, there was no calibration certificate supplied.

Does this come complete with batteries? Thanks in advance:)

Hello, yes, the GARDENA smart flow meter comes with batterie. Best regards GARDENA Service

can I measure the total water usage over a period of time (example six months?) or just for a single use utill the water tap is on?

Either, Total 1 and Total 2 are manually resettable (NB: they are also reset if you change measurement units between litres and gallons), Auto measures a single use while the tap is on and resets to zero when flow starts.

Display type	LCD
UPC	793518046102
Global Trade Identification Number	04078500818803
Manufacturer	Gardena
Product Dimensions	24 x 18 x 6.6 cm; 222.26 g
Part number	G8188-20
Item display height	20 centimetres
Item display length	30 centimetres
Item display width	20 centimetres
Item display weight	2 Kilograms
Material type	Plastic
Item volume	2851.2 Cubic Centimetres
Power source type	AC
Item model number	271710
ASIN	B006MWDQZQ

Gardena8188-20 Water Meter - Multi-Colour

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