2 4 TFT HD Color Display Guide rail type smart meters Display Panel 2 4 inches TFT LCD HD Display Panel Graphic 240X320 RGB Dot matrix Firmware Upgrade Notice 1 Short press the key buttonor key buttonto switch the function interface2 Long pressthe key buttonor key button to turn onor turn offthe device Specifications Mobile phone Bluetooth APP control over current protection short current protection over voltage and under voltage protection Electricity unit price setting electricity cost statistics including relay circuit breaker Features Product Item AT4PB Bluetooth WIFI optional Rated current 0 100A Rated Power 0 26 5KW Rated voltage L N 85 265V 50 60HZ Under voltage protection 90V 250V Adjustble Installation 35MM DIN RAIL Over voltage protection 90V 300V Adjustble Over current Protection 10A 100A Adjustble Package Included 1 Xsmart meters