The Zhongyang R350 is a super rugged and compact handheld computer with multiple functions and reliable performance. It is suitable for use in harsh outdoor environments. It features EMI, temperature resistance, reliability, waterproofing, shock resistance, dust resistance, and powerful communication capabilities.

This is a Lenovo laptop user manual, which introduces the various parts of the computer and their functions, as well as how to use the computer's basic operations

RC-30/30A/30B temperature recorder is a cost-effective temperature recorder with reliable performance, simple operation, low power consumption, no data loss after power failure, good waterproof performance, LCD screen displays working status and temperature data, and data processing software interface friendly. This series of products are widely used in food, medicine, cold chain transportation and various industries that require HACCP system, and can also be used in laboratories and other places that need to monitor temperature.