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Abs environmental protection material, non-toxic tasteless, toughness, hard and soft balance of excellent mechanical properties, make products safer, wear resistant, stable Light compact display clear, can be placed, or can be opened for installlation Low power consumption, one battery can be used for one year Round fuselage design, opening installlation more convenient Embedded temperature humidity meter electronic temperature humidity meter digital temperature humidity meter probe built-in black white The product is packaged in white box, without words.Unisex packaging Functional overview: 1.Lcd display -48x28.6x15.2 mm shape size (small error in measurement) 3.Lcd size: 35.7x16.8 mm (measurement with small error) -weight: 25 g (without battery) -humidity display -humidity measurement range 10%~99% -humidity display resolution 1% -humidity sampling cycle 10 seconds (1 minute) -5% humidity measurement accuracy -rated voltage dc1.5v (2 ag13 button battery) -range of temperature measurements-50 to 70 -1 degree accuracy of temperature measurement (under constant temperature) Installlation of batteries Flip to the back of the product Push off the battery cover in the direction indicated by the arrow Put two lr44 button batteries in the cell slot