Product review (5 stars): Handy, reliable, inexpensive way to ensure safe storage of photo gear
Extremely handy, accurate tools for monitoring and maintaining humidity.  I am spending time in a warm, humid climate and am an amateur photographer who has experienced mildew/dampness damage to photo gear in the past.  This is a low-cost, convenient and apparently sufficiently accurate tool for verifying storage conditions of equipment between uses, indicating the humidity and temperature inside enclosed plastic containers that I use for equipment storage.