A common posthuman preoccupation is measuring the rhythms of life as the sounds or beats contained in various objects and beings. This watch I invented from a broken computer measures time not atomically, but subjectively -- according to my heartbeat.
Detecting the network of veins and arteries underneath my skin, it measures (and listens to) percussive sounds and even arythmia, which reflects the potential of being out of balance or unwell.
To power this device, the melanin in my skin processes it's cells into the device. That is why the area nearby is slightly lacking in the usual colour.
Time, according to this device, is always within my control. And time, as measured by life, is always running out. A long and drawn out but very epic fade.