Features: Dolphin shape design No touch design, without mouthpiece needed Consecutive tests available Quick analysis, one second to show result Matrix LED warning method Extra flashlight function, more suitable to use at night Extra simple traffic sign function Active and passive test mode available Technical information: Sensor: fuel cell alcohol sensor Detection range: 0 to 2.000mg/L Working environment: Temperature: 0 to 50掳C Humidity: <95% RH (no dews) Warning level: adjustable Power: 4 x AA batteries (500 tests) Dimensions: 284 x 68.5 x 74mm, 400g