Points:1、Voltage Measure: This dial voltage meter can measure voltage between DC 3.5 to 30V.2、Accurate Measurement: The dial ’s measurement accuracy is 0.01V (3-10V); 0.1V (10-30V).3、LED Display: There are three dial LED tubes in the dial .4、Re Connection Protection: With re connection protection, this dial will not if connected rely.5、Direct Power Supply: No additional power supply is required. The measured voltage is directly d as the power supply.Features:1.Low-startworkingvoltage,red4.5V,green4.7V,blue5.0V.2.Withreconnectionprotection,itwillnotifconnectedrely.3.Powersupplyrange:noneedforadditionalpowersupply,itdirectlythemeasuredvoltageasthepowersupply,sotherangeisthesameasabove.4.Tolerance1%0.3;errorisgreaterthanorequalto10v±0.10v;errorislethan10v±.5.Updatespeedforonceisabout300ms.6.Three-wayleddialtubedisplaymode.Specification:Model:DSN-DVML-568-2Inputimpedance:>100KWorkingcurrent:red