Product DescriptionFeatures:100% brand new and high qualitySmall size, high efficiencyResolution adjusting range:with installing hole,easy to install,hole diamere:2.5mmTemperature Range:-55~+125Deg.CTemperature measurement precision:0.5Deg.Cworking voltage:DC 5Vdigital signal output Specifications:size:approx. 2.8*1.3cmmain chip:18B20 temperature sensorworking voltage:DC 5V