The OptiVac is the most versatile product in the industry-leading Gomco line of portable suction equipment. Its compact design, ease of operation, rechargeable battery, AC power supply, and fully-enclosed unit are just a few of its unique features. Standard Features ? 3 hours run time at maximum vacuum on a fully-charged battery ? 1 hour run time after just 2 hours of charging ? AC or DC operation … ready when you are, 24/7 ? 25-550 mm Hg vacuum range, coupled with greater than 30 lpm flow, provides powerful suction for faster aspiration ? Fully chargeable in 8 hours ? Will run at full performance on AC power even with a depleted battery ? Battery maintenance system keeps the battery fully charged but not over-charged ? Long-life internal rechargeable battery eliminates the need for frequent replacement ? Sealed water-resistant unit is easy to clean, and minimizes potential contamination or damage to the compressor and battery. ? Angled control panel for easy viewing ? Impact-resistant and durable ? 3-year warranty on the unit, 1 year on the battery