The device is new and unused. Price: On bid Key Specifications * Brand: Respircare * Model: PO5 * Type: Portable oxygen concentrator. * Oxygen generation technology: PSA with replaceable dual molecular sieve. * Oxygen purity: 93 ± 3%. * Weight: 2 kg including battery. * Dimensions: 18.8 × 9.8 × 20.8 cm. * Operating mode: Pulse flow with 5 settings. * Breath sensor sensitivity: 0.2 cmH2O. * Continuous backup mode: Automatically switches to continuous flow at 1000 ml/min if no breath is detected for 30 seconds, and returns to pulse mode when 3 breaths are detected within 2 minutes. * Battery: Detachable lithium. * BAT-01: Up to 6 hours of operation depending on setting. * BAT-02: Up to 12 hours of operation depending on setting. * Charging: Via Type-C port, with the ability to charge batteries independently. * Display: 2.8-inch color screen. * Alarm system: 12 levels of alarms with event log. * Warm-up time: 2 minutes. * Charging time: More than 2.5 hours for BAT-01, and more than 5 hours for BAT-02. Features * Portable and lightweight design, weighing 2.0 kg including battery. * Oxygen concentration up to 93 ± 3%. * 5 pulse flow settings. * High-sensitivity breath sensor to help synchronize supply with inhalation. * Automatic continuous backup mode when breathing is not detected. * Detachable lithium batteries available in two different capacities. * Ability to charge batteries independently via Type-C. * Clear 2.8-inch color screen. * Multi-level alarm system with event log. * Replaceable dual molecular sieve. * Compact design suitable for travel and outdoor use.