... Recognition 3 Automatic Temperature Compensation 4 Hold Function,Power Monitor Boke5 series Portable Conductivity/TDS/Salinity/Temp Meter Parameter: ModelBoke520Boke53Boke540Conductivity Range0 ... Included: Conductivity Cell, Temperature Probe, Battery. Optional Accessory: Carrying Case. Boke5 series Portable Conductivity/TDS/Salinity/Temp Meter