Anion air purification Necklace

Spec.：
Product material: ABS + hardware + Electronics
Product color: Blue / Black
Product specification: 60 * 55 * 20MM
Light indication: the red light flashes slowly when charging, the red light is always on when fully charged, and the blue light breathes gradually when working.
Input voltage: DC5V
Charging time: 40 minutes
Working time: about 48 hours of continuous use