1. Operating voltage: DC3.7-DC5V/1.5A 2. Power: <1W 3. Current: maximum 15-20mA 4. Noise: about 20 dB ultra-quiet 5. Battery capacity: 380mA 6. Charging interface: micro USB charging 7. Charging time: 30 minutes 8. Material: environmental protection ABS+PC 9. Negative ion concentration: 20 million/cubic centimeter 10. Life time: 15 hours -20 hours 11. Product weight: 40g 12. Passed CE ROHS FCC certification 13. Function: Purify formaldehyde, effectively block viruses, strongly purify smoke, remove PM2.5, remove allergens 14. The negative ions released by the negative ion purifier can condense small particles of 0.04-3 microns suspended in the air into larger particles, and forcefully repel the wearer's breathing area 15. Hanging neck design, follow 24 hours a day, meet daily use 16. Safe and no radiation, no fan and noise
