Function description:1. Supply voltage: DC6-24V (DC 9V 12V 15V 24V)2. Working current: 8-13MA (related to the number of external DS18B20)3. MODBUS RTU supports 03 06 function code4. By modifying the 485 address, up to 247 modules can be cascaded for use (please use R485 repeater for more than 16 modules)If Using DS18B20 temperature and humidity sensor, up to 8 DS18B20 temperature sensors can be connected at the same time(DS18B20 sensor not included)Temperature measurable range: -55C to +125C (-67F to +257F).Accuracy of +-0.5C for temperatures within -10C to 85C.Dimensions: 70 X 46 X 18MMWeight: 40 gramsTypical application:Thermostatic ControlsPaperless recorderIndustrial SystemsConsumer ProductsThermometersThermally Sensitive SystemsIndoor and outdoor temperature measurementTemperature in vegetable gardenWeather forecasting, and monitoringTemperature in Computer RoomWarehouse temperatureColor: white + blueMaterial: PCB board + electronic accessoriesPackage Contents:1 pcs R4DCB08 8CH RS485 Temperature sensor BoardOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.