DC 5V W1209 Thermostat Temperature Blue LED Switch Thermometer LED Digital Blue Display Voltmeter 4S 5V 2A For DC 12V Voltage And W1209 DC 5V Blue LED Thermostat Temperature Switch Thermometer DHgate.com:Ultra Range Digital Thermometer, DC 5 12V Waterproof. 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