Powered by compressed gas, ideal for emergency use in environments without electricity.Pneumatic and electronic control with built-in anti-air backflow valve and breathing assist sensor, suitable for various toxic environments; compact hand-held design; lightweight, main unit weighs ≤300g; standard ABS engineering plastic case, sturdy and easy to carry; optional suction and mask oxygen supply (upgraded three-in-one function); single-handed operation facilitates on-site cardiopulmonary resuscitation; oxygen concentration selectable at 50% or 100%, conserving oxygen during out-of-hospital transport; continuously adjustable respiratory rate and tidal volume, suitable for children over 10kg and adults; intelligent alarm system triggers sound alert and automatic pressure release when airway pressure is too high or obstructed.