... is made of soft, safe and comfortable. And with the filter cartridge and micro motors, valves, and respiratory system integration with ... dry, ventilated, temperature suitable place, not exposure to organic solvents. 5.2 Storage period: 3 years. Battery: voltage DC1.2V, current ... 800mA; Charger: Input voltage 100 ~ 240 V, output voltage 5.2V, current of 320mA, charging method by 3.6 requirements ...