We are offering alcohol tester etc.tester.specification indication of b.a.c 0.00 to 40% bac 0.0 to 4% 0.0 to 2.00mg/l accuracy 0.01%bac at 0.1%bac at 25’c warm up time within 20 seconds response time within 5 seconds sensor advanced semi conductor sensor display 3 digit display with backlit lcd power two aaa size alkaline batteries battery time 200-300 times with fresh batteries size 34mm*103mm*25mm weight 57gm calibrations every 6 months or 200 times tests.