Our Car & Home model most suit to traveller or those spending more time in the car. This model can be used in car with car adaptor and also use in home with AC connector. This is a health grade oxygen concentrator produces 30% concentrated oxygen at 3 lit/min flowrate. Model: Car & Home Specification: ~ Net weight: 3kg ~ Size: 23.5 x 12 x 29.5cm (LxWxH) ~ Voltage: 12V DC ~ Power consumption: 20W Features: 1. Air Flow volume: 3L/min 2. Oxygen concentration: 30% 3. Noise: 45dB 4. Performance: Efficient oxygen supply. 5. Design: concise top panel for simplified operating procedure. 6. Carry: Portable and light. 7. Energy efficient. 8. Nano ear phone: oxygen suppy free from contamination. 9. Low noice: mute DC brushless motor and biological oxygen generation. 10. Safety broad-spectrum: oxygen concentration satisfying varied demands. 11. Ergonomic design: harmonious airflow.