Description: 3.5″TFT Color Display, easy to read The new UI interface, easy operation Intelligent function with Auto. timing datalogger, parameter setting, data holder Data storage up to 3000 groups Cond mode: Support probe constant calibration, conductivity standard solution calibration Power supply: rechargeable lithium battery/USB Charging socket: USB/Type-C, in line with the European new regulations. Protection class: IP57