... back-light Option: RS232 interface - optional Crane scale,electronic crane scale,wireless crane scale,dynamometer,load cell, force tester1. 25mm LCD display ... .5kgAluminumERT2000kg1kgAluminumERT3000kg1kgAluminumERT5000kg2kgAluminumERT10000kg5kgAlloy steelERT20000kg10kgAlloy steelERT30000kg10kgAlloy steelERT50000kg20kgAlloy steelERT100000kg50kgAlloy steelERT200000kg100kgAlloy steel Crane Scale