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Product Specifications: Range: Low & 0.15 ~ 1.50 ‰ BAC, HI Power Input: Rechargeable battery Display: Digital display with 0.01‰BAC resolution Lamp: LED torch with dimmer Breath sampling: about 6 seconds continuous breath sample Cycle time: about 50 seconds Unit Dimensions: 107 X 45 X 23 mm approx.Weight: 55g Self-calibration: Fully automatic for user Accessories: 1 pcs USB cable for charger (charger not included)