LED Digital Blue Display Voltmeter 4S 5V 2A For DC 12V Voltage And 5pcs Blue DC 5V To 12V 50?C To 110?C Digital Thermometer Monitor Multipurpose Thermometer H09bdf053be164800a98d7b1dc8e280fc2.jpg DC 4 28V 5V 12V 0.28 inch LED Display Dual Voltmeter Digital. Parameter: Power supply: DC 5V 12VColor: blue Size: 48*29*23mm (length*width*height) Test range: 50C to 110C Display accuracy: 0. 1C Refresh frequency: 200MS Probe parameters: 25C 10K, ratio 3435 Storage environment: 40C to 65C Opening size: 45. 5*27mm Package included: 5 X DC 5V to 12V digital thermometer