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High Precision Household Indoor Outdoor Thermometer Hygrometer Air Psychrometer Aluminum Shell
US$8.36 US$10.04

Q: Dears, is this battery operated?

Asked by Rudi G. on 2018-06-17 03:29:18

Zoe No，it does not need battery .The working principle is the thermal expansion and contraction of the internal metal to deflect the pointer.

2018-06-22 02:12:16 Helpful (0)
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