We offer Apresys USB Disposable Temperature Data Logger. Model #In-Transit Specifications Temperature Range -40F 185F -40C 85C Accuracy 0.8F (0.5C) Resolution 0.01F 0.01C Battery Lithium Manganese Battery Storage life 3-5 Years normal use Dimension 3.5" x 1.3" x 0.5"(8.9cm * 3.4 cm *1.2 cm) Weight 1.25 oz.( 35g ) Models D25, D50, D99 Selection Guide Model: D25 Max Recording 25 Days, 5 Minute Sample rate (Suggested Use: 1-25 Days) Model: D50 Max Recording 50 Days, 10 Minute Sample rate (Suggested Use: 25-50 Days) Model: D99 Max Recording 99 Days, 20 Minute Sample rate (Suggested Use: 50-99 Days) Features USB port Connected with Computer Directly for Data reading, saving, printing, easy to use This model of temperature recorder is efficient, durable and portable, economical and practical for low cost requirement. As our products are made of superior soft material, they are shock-proof, dust-proof and fog-proof. This model we produced is characterized by its compact size and high accuracy. Even if the power is using up, it still can be used for reading and printing data.