This is not your average smartwatch: the Scent Rhythm releases fragrances that the designer, Aisen Caro Chacin, associates with waking up, being active, sleeping, and relaxing. Every six hour, the watch releases the right scent for that time of the day. This watch has a lithium-ion battery pack that can be charged via a micro-USB port on the wristband. One charge lasts 24 hours. Not your typical smartwatch, but the Scent Rhythm sounds like a fun device.