THIS DETECTOR HAS A SEGMENT LIQUID CRYSTAL DISPLAY AND A TWO-BUTTON KEYPAD THE TOP OF THE CASE IS DESIGNED WITH POLYCARBONATE WITH A RUBBER OVERMOLD AND THE BOTTOM IS CONDUCTIVE POLYCARBONATE THE DUALSENSE?รครณ TECHNOLOGY INCLUDES TWO OF THE SAME SENSOR FOR THE DETECTION OF A SINGLE GAS THROUGH A PROPRIETARY ALGORITHM AND DISPLAYED AS A SINGLE READING TO THE USER THE REPLACEABLE LITHIUM NONRECHARGEABLE BATTERY PROVIDES A THREE-YEAR RUN TIME