Linksys WPSM54G User Manual page 54

Wireless-G PrintServer with Multifunction Printer Support
Storage Temp. -20ºC to 70ºC (-4ºF to 158ºF)
Operating Humidity 10% to 85%, Non-Condensing
Storage Humidity 5% to 90%, Non-Condensing
Appendix F: Specifications 48