(Pronounced like you'd pronounce plural of "Riffleito", if your mouth were full of crackers.)
The "TH" stands for "Temp and Humidity".
A Riffle connected to a DHT22 sensor, logging data w/ timestamps on a battery.
The on-board RTC has a built-in temp sensor; these graphs compare the RTC temp sensor with the DHT22 sensor.
[Posting pics for now, more explanation to come later]