Features:
1.work time can over 20 hours after full recharge
2.test battery and auto turn off
3.show by 0.8 inch red LED
4.choose the range of zero tracking
5.preset constant of filtering time
6.switch units between kg and Ib
7.RS-232 port
8.optional RS-485 long distance port
9.animal weighing
10.keep peak value
11.counting function
12.printer and output functions
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