Sensors in the Optimal case detect subtle variations in a phone 's temperature . Micro - fans inside the device cool the phone down if it gets too hot . While built - in resistance coils gently heat the device if it gets too cold . it is available on demand this year , but prices have n't been revealed .
Sensors in the Optimal case track subtle changes in a phone 's temperature . Micro-fans inside the case cool the phone down if it gets too hot . While built-in resistance coils gently heat the device if it gets too cold . Case is launching on Indiegogo this week , but prices have n't been revealed .