HoMedics HL858DM Instruction Manual page 30

Storage and Maintenance
Storage
 If the device is not to be used for a long time, please remove the batteries from
the device (leaking of battery acid can cause the device to malfunction).
 Always store the unit in the storage case after use. It is intended to be
transported or stored in a carrying case between uses.
 Do not place the device directly under sunlight, in high temperature, or in humid
or dusty places.
 Do not store the device in extremely low (less than –13℉/–25℃) and high
(more than 122℉/50℃) temperature, nor in a place its humidity exceeds 93%
R.H.
30
VER: A001 202203