Features: 1.High?sensitivity wine sensor, the detection result is accurate and fast, without waiting too long. 2.With compact shape, not taking up much space, light weight, easy to carry and easy to use. 3.Low power consumption, it will automatically shut down if not used for a long time to avoid wasting power. 4.Backlit LCD screen, 3 kinds of indicator light indicates the test result, green means undrinkable state, orange means drinking, red means drunk. 5.Dust?proof design, sliding upward to close the air inlet, can be used for a long time. Specification: Item Type: Breathalyzer Material: ABS Color: Black Size: Approx. 102x28x20mm/4x1.1x0.8in (Please allow 1?2mm difference due to manual measurement.) Type of Wine Sensors: Hemiconductor Response Time: 20s Measuring Range: 0-19% BAC 0-1.9g/l Indication error: 0.01% BAC Operating Temperature Range: - 5-45 Blowing Continuity Test: 5 seconds (flow rate: 10L / min) Built in Polymer Lithium Battery: Battery Capacity: 200MAH Display: LCD display Alarm Mode: Buzzer Meaning of Indicator Light: Green: Undrinkable state Orange: Drinking state Red: Drunk state Charging Mode: DC 5V 1A, Micro 5p interface Using Steps: 1. Slide down the switch to display the WARM UP logo and blow for 10 seconds 2. Display the BLOW sign and start blowing 3. Display the RESULY sign to read the value 4. Display OFF sign, shut down with 2 beeps PackageList: 1 x Breathalyzer 1 x Data Cable 1 x Manual 1 x Storage Bag Note: Please allow 1?2mm difference due to manual measurement.