Oxygen concentrator specifications include oxygen output (e.g., 5 LPM), purity (e.g., 93%±3%), sound level (e.g., < 46dB), weight (e.g., 13.6 kg), power consumption, and various safety features like alarms for power failure, high/low pressure, and system malfunction. Other important factors are the flow rate range, dimensions, continuous operation capability, and operating conditions like altitude and temperature