New and high quality! Description: Measurement range 5V-100V Power supply range 5V-100V Minimum starting voltage of 3.8V Permissible error ± 1% Input impedance>100K ohms Working current red<15mA, green<12mA, blue<12mA The refresh rate is about 300mS/time Display method: Three circular LED digital tubes Display colors available in red, green, and blue Lead length 20cm External dimension diameter 33.8 Opening size diameter 30.0 Net weight approximately 4g Gross weight approximately 8g Working temperature10 ℃~65 ℃ Color: As shown Size: Reference picture Package includes: 1PC Note: 1. Due to manual measurement, please allow an error of 1-3mm. 2. As different computers display different colors, thank you for your understanding, the actual product color may be slightly different from the image.