1. CLEAR AND INTUITIVE DISPLAY: Digital frequency meter uses a 0.56inch LED font size to display the distribution of data in a concise form, so that readers can quickly understand the data 2. EASY INSTALLATION: The digital display frequency meter has a 68x68mm opening size, possess small size, and can be installed anywhere, very versatile 3. WIDE APPLICABILITY: Frequency meter can be used in various fields, such as industrial automation, mechanical and electrical equipment, distribution box, industry, etc., has strong versatility 4. TECHNICAL PARAMETERS: Digital cymometer with auxiliary power supply AC 80-500V, frequency measuring range 10-99.9Hz, high measurement accuracy of 1%(±2 digits) 5. SCRATCH RESISTANT plastic: AC frequency meter adopt excellent plastic material, impact resistant, scratch resistant, suitable for pure AC 50-61Hz mains power supply Item Type: Digital Frequency Meter Model: For CH 72 Power Supply: AC50-500V Frequency Range: 10-99.9Hz Measurement Accuracy: 1% (±2 digits) Color: Black Material: plastic Package Contents: 1 x Digital Frequency Meter