... display 3 pre-tare,accumulation and sample counting function 4 optional RS232 Large Screen Weighing Table Scale Features:* Displaying resolution: 1/15,000 ... (for Taiwan), KJ (for Hong Kong), PCS,%.*Percentage analysis.*Simple counting.*Mutil linearity calibration.*3 points calibration, 6 points calibration and ... /300mA AC/DC 100-240 VAC,50/60Hz Large Screen Weighing Table Scale