Dear customer: Thank you for choosing my store for shopping. The following are the matters needing attention for shopping: A. Economic transportation: detailed tracking information will not be included. Most of the packages will cause delayed delivery within the expected delivery time, so you need to be patient B. Each product link: There will be different option variants. If you do nt know how to select the product you want, please contact me, I will be honored to solve this problem for you. C. When you receive the package, there is product damage / product problem / error product and shipping problem, please contact me in time, I will solve it for you! D. If you are a wholesaler / distributor, a large number of orders and quantities, to provide you with factory prices, and hope to be honored to reach a partner with you! GOOGZON store: I wish you a happy life! STC-1000 Operation Instruction Main function Switch the modes between cool and heat Control temperature by setting the temperature set value and the difference value:Temperature calibration; Refrigerating control output delay protection; Alarm when temperature exceeds temperature limit orwhen sensor error. Specification and size Frontpanel size:75(L)x34.5(W)(mm) Mounting size:71(L)x29(W)(mm) Product size:75(L)x34.5(W)x85(D)(mm) Sensor length: 1m(include the probe) Technical parameters Temperature measuring range:-50~99CResolution:0.1C Accuracy:1C(_50C~70C) Power supply:12V 24V110-220VAC 50Hz/60HzPower consumption: