NS-T6393 Features:1).Sensor: semiconductor sensor2).Warm-up time within: 10 second.3).Response time within: 5 second.4).Operate temperature: 5 ~ 405).Detection Range: 0.00% ~ 0.19% BAC6).3-Step test levels show on display with sounds according to alcohol concentration:Safety: under 0.02% BAC Caution: 0.02% to 0.05% BAC Danger: over 0.05% BAC7).Quick results and Restores.8).Automatic power-off function.9).Low-Battery warning.10).Torch function.11).Key chain function.Battery input: 3VDC(2 X AAA alkaline batteries) not includedUnit size :100 x 45 x 20 mmPrint size:20x15mmNS-T6392 FEATURE:1) Design patent2) Semiconductor sensor inside 3) Warm-up time: within 10 seconds4) Response time :within 5 seconds5) Operation temperature:5-40 3) Convenient to carry by keychain6) 3 test steps with LED indication7) Test result:a) Safety: under 0.02% BAC b) Caution: 0.02% - 0.05% BACc) Danger: over 0.05% BAC 8) Battery: 2 x AAA alkaline batteries (not included)9) Size: 76 x 35 x 22mm10) Print size: 12 x 20 mmNS-T6340 FEATURE:1) Design patent2) Semiconductor sensor inside 3) Warm-up time: within 10 seconds4) Response time :within 5 seconds5) Operation temperature:5-40 6) 3 test steps with LED indication7) Test result:Green light: < 0.02% BACYellow light: 0.02% ~ 0.05% BAC Red light: 0.05% BAC8) Battery: 2 x AAA alkaline batteries (not included)9) Size: 85.2 x 39.2 x 20mm 10) Print size: 18 x 25mm producing area:China payment:30% T/T