included pressure gauge offers excellent visibility of circuit pressure
integrated gas evacuation valve (a one-quarter-turn valve designed for rapid transger between spontaneous and controlled ventilation)
integrated gas evacuation exhaust port is built into the mounting bracket, eliminating the risk of obstruction in the tube
integrated 0.5 cm H20 check valve built into the adaptor to reduce the possibility of a faulty evacuation system drawing out into the patent's fresh gas supply