Featuring both a pulse and continuous mode, this compact oxygen delivery system offers a nearly silent operation process. It possesses a sensitive breath trigger, able to read the slightest breaths. At maximum setting, it uses less than 33 dBA. The patient can take up to 40 breaths per minute using this machine. 90 percent purity will then be delivered at 100 ml per breath. Bolus volume delivery is guaranteed. The device is portable as well. 2 hours of operation at the maximum setting are provided by an optional battery. An optional KMX-3L car adaptor can be used to charge the batteries.