PDD Group Ltd. has recently announced SNIF, a wearable chip-controlled skin patch that delivers customized fragrances.
The device employs an Application Specific Integrated Circuit (ASIC) chip to control up to 3 scent reservoirs. A small cell powers the chip that controls the heating elements that vaporize the fragrances. Sensors on the chip monitor temperature and atmospheric conditions in order to diffuse the optimal levels of perfume. 
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