This small engine tachometer combines low voltage and low power consumption with long standby time, and is designed to be waterproof and shockproof for rugged outdoor use. Key benefits - Monitor engine speed and running time in one compact unit, helping prevent over-revving and support maintenance planning. - Rugged design with waterproof and shockproof construction for reliable outdoor operation. - Simple, clear readout with a user-friendly interface for quick checks in the field. Specifications at a glance - RPM Meter and Hour Meter: speed range 0-30000 rpm; timing range 0-9999.9 h. - Induction methods: clip mount induction and handheld gesture induction; best sensing distance 3 cm-5 cm (1.18 in-1.97 in). - Display: LCD screen for clear, at-a-glance readouts. Use scenarios - Chainsaw maintenance: verify engine speed and total run time to schedule servicing and inspections. - Field testing of small engines: quickly check RPM under load on trimmers, mowers, or similar tools. - Post-repair verification: compare RPM and accumulated hours before and after service to confirm performance and reliability. This description keeps the original functions and ranges intact while presenting clear, customer-focused benefits in concise language.