The LCSU4 is always ready to provide effective suctioning to a patient. Its small size and shape enable it to be carried in an airway bag to every call. It is available in 2 versions: a compact 300-mL or an 800-mL capacity canister that can be used when added suction volume is required. Each version can easily be converted to the other canister option. A variable vacuum regulator with an LED display provides the power and control needed to quickly clear a blocked airway. An AC/DC-enabled, field-changeable, NiMH battery pack has enough power to get the job done.