Product Description: The SYS-1 Quartz Timer Counter is a fully sealed, high-precision industrial hour meter designed for reliable, long-lasting performance in harsh environments. With its compact, durable construction and low power consumption (0.3W), it ensures accurate time tracking (up to 99999.9 hours), making it ideal for billing, maintenance scheduling, and equipment monitoring. Widely used in construction machinery (excavators, bulldozers), agricultural equipment, generators, air compressors, pumps, cranes, trucks, and automotive applications, this 100-250V AC timer provides scientific data for service intervals and usage-based billing. Its shock-resistant (10-70Hz, 1-8g) and fully sealed design ensures stable operation in extreme temperatures (-10°C to 75°C) and high humidity. Key.