Check the listing for details. Raspberry Pi RTC Real Time Clock module. Pi 4 Fan and/or Heatsink compatible. Condition: New, Made in United Kingdom. Listed at 12.13 USD. New version of our ever popular Pi RTC. Now compatible with a low profile heat sink being fitted to a Pi 3 or 4 and supporting fan control, such as the fan available for the Official Pi4 case (a 3pin 0.1" header will need to be fitted to plug the fan into (not supplied)). four-d-pi-shop is the ebay arm of CJE Micro‘s & 4D, who have the world's widest range of Raspberry Pi/RISC OS & Acorn accessories including many from third parties, most of which are famously normally 'In Stock'. Established in 1981, we have always specialised in hobbyist computing and have gained a reputation for a broad knowledge with high quality pre- and post-sales service. CJE & 4D have, over the years, developed many of our own products for Acorn/RISC OS & Raspberry Pi computers. From the first ever 3rd party acce.