Three power supply: 

? 220V/110V, 12V or battery(60min.)　  

? Ambient Temperature: 5-40℃ 

? Relative humidity: <90%  

? Specifications: Concentration: 90%±3% 

? Instant Flow rate 0-5L/min (max)  

? Breath segment control:  Sensor to release oxygen when breath  

? Voltage: 12V , 220V/110V or Battery (60min.)  

? Battery power: 40A/h  

? Dimension: 290×188×100(mm)  

? Net weight: 3.9kg(battery included)

? Alarm: Alarm can be heard without breath for 30seconds; 

Alarm when battery is less than 10%  

? Timing: Record the accumulated working time of compressor.

? System will remind of the maintain or change of compressor after 

   15,000-20,000hours of operation