This is a compact alcohol checker. I purchased it from the discount shelf at Seki Pharmacy. Although the outer box has some folds and sticker marks, it is new, unused, and unopened. Trade One Alcohol Checker Arco Plus Measures alcohol concentration just by blowing into it! For checking before driving and as a guide for managing your physical condition after drinking. Just breathe into it! Measurement in about 10 seconds! This alcohol checker is simple to operate and easy to use. You can easily measure your blood alcohol concentration just by blowing into it. Compact and palm-sized. Convenient for carrying and storage. A handy strap is also included. 【Product Details】 ● Product size: W35mm, D17mm, H95mm ● Material: ABS resin, electronic components, etc. ● Country of origin: China ● Weight (g): 20g ● Accessories Main unit x 1, strap x 1, instruction manual x 1 ● Blood alcohol concentration measurement range 0.00〜0.19%BAC, 0.0〜1.9g/L ● Startup time: Approximately 10 seconds ● Measurement time: Approximately 10 seconds ● Measurement method: Open blow method ● Sensor method: Semiconductor gas sensor ● Sensor life: 1 year after purchase or 1000 uses ● Memory function: None ● Operation sound: Yes ● Uses 2 AAA alkaline batteries (sold separately) ● Precautions for use The measurement data of this device is only one factor in determining whether or not you have been drinking and does not determine whether or not you are fit to drive. ※ This product is not a legal alcohol detector.