Automatic 25~55%RH at ambient temperature
Totally silent operation, no moving parts
Maintenance free, self-regenerative drying agent
Minimal electricity consumption, Hygrometer does not use batteries/electricity
Mfr #: 120557 | Manufacturer: Heathrow Scientific
Heavy cardboard mailers for safe transport
Cover that opens for viewing and thumb grooves for easy slide removal
Securely holds slides with or without cover...