The Marathon Oxygen Sensor features a compact and lightweight design for easy portability and installation. It also comes in various models and specifications, allowing for selection based on different application scenarios and measurement requirements. In terms of packaging, we implement multiple protective measures such as shockproof, moisture-proof, and dust-proof to ensure the product remains undamaged during transportation and storage. It's hot in summer but not too cold in winter. It's cleaner and quieter than many other cities. I believe my hometown will become more beautiful in the future. Welcome to Jinan.