Hygrometer comes with a long-lasting AG13 battery. AG13/LR44 batteries required (best with Polaroid AG13/LR44 batteries)
	
Accurate sensor measures humidity and temperature every 20 seconds
	
Innovative 3-in-1 design for sound hole, case, or room
	
Hang from strings to monitor sound hole or use Case Holster to securely use in instrument case
	
Reads Fahrenheit or Celsius and displays maximum and minimum levels