Philips Everflo 5LPM concentrator

 Power: 230V/50Hz
Liter flow: 0.5-5 liters per min
Sound level: 43 dBA
Oxygen purity: 90% - 96%
Weight: 14 kg (32 lbs)
Dimensions (HxWxD): 580mm (22.8"), 380mm (15"), 240mm (9.5")
OPI (oxygen percentage indicator) alarm levels: Low oxygen: 82%, very low oxygen: < 70%
Required maintenance: Compressor intake filter: 2 yr