1. With AC/DC power supply, low power cost, after recharging A2 can be used for 40 hours (without backlight function and connect to 6 load cells)、A2+ can be used for 20-40hours（connect to 6 load cells） 2. Calibrate with digital keyboard (locked by hardware and software), 5 sect non-linearity adjust，agility calibration rate amend（display number amend、rate amend）, no need to re-calibrate when change division 3. Zero range can be selected from 0d~4.5d, tare range and switch-on zero tracing range can be selected from 0%~100% 4. 1 to 3 bills printing, record printing, fill printing 5. 459 car No. and tare weight, 1000 cargo No., 459 group weighing record 6. Different format daily report, can be printed separately 7. 100 years real time clock 8. 1500W avoid detonator protect at the port of the load cell signal input, I/O isolated from the print port 9. User can set the Car No, Cargo No. to let the indicator suit for different floor scale, weighing bridge, platform scale etc.（the default setting leave factory is Car No, Cargo No. shielded, print is mini printer）