Subtronics India Pvt. Ltd. Offers Pocket Type Breathe Alcohol Analyzer with Audio and Visual Flashing Alarm, bearing the model number ALH 5000. Subtronics India Pvt. Ltd. Is an ISO 9001:2000 certified company. Pocket Type Breathe Alcohol Analyzer with Audio and Visual Flashing Alarm requires an operating voltage of 6 volts D.C with four 1.2 volts small pen-cells for ten hours. Yellow LED indicates the low battery of the equipment while the green LED indicates that the machine is ready to be used. Blue LED confirms battery charging process. Pocket Type Breathe Alcohol Analyzer with Audio and Visual Flashing Alarm has a robust plastic enclosure. Free of cost Battery Charger, Test Bottle [50 mg or 100 ml of blood] and Leather case with belt clip are the accessories provided with this product.