1. Built-in screw wiring, safe and convenient to use, sturdy and stable structure, suitable for long time work2. Can be used in electrical power, telecommunications, machine tools, shipping, textiles, printing, mining machinery and other industries signal indication, alarm signals, accident signals, etc3. Professional and practical design, beautiful appearance, easy to carry and use4. Made of plastic surface, durable and wear-resistant5. No signal input prompt message: display 0006. This product is prohibited in the frequency conversion, high frequency, inverter, harmonic interference signal strong power environment, applicable to sine wave 50-60HZ AC frequency utility powerParameters:1. Input voltage: AC 220V2. Frequency test range: 3-120Hz3. Accuracy: 2 percent +/-Hz4. Display resolution: 1Hz5. Sampling rate: about 1 time/s6. Input circuit power consumption: less than 2VA7. Ambient temperature: -25-55 degrees celsius8. Overall dimensions: 73 x 73 x 52mm9. Installation aperture: 68 x 68mmSpecification: Package Weight One Package Weight 0.16kgs / 0.36lb One Package Size 8cm * 8cm * 8cm / 3.15inch * 3.15inch * 3.15inch Qty per Carton 90 Carton Weight 15.50kgs / 34.17lb Carton Size 50cm * 34cm * 34cm / 19.69inch * 13.39inch * 13.39inch Loading Container 20GP: 461 cartons * 90 pcs = 41490 pcs40HQ: 1071 cartons * 90 pcs = 96390 pcs
