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The Raspberry belongs to Bebo White and it is the version 1 of Raspberry Pi, model B. The cost is about $25/each + costs of the SD card. The Raspberry purchased has 512MB RAM, on a 700Mhz ARM CPU and a 32GB SD SDHC Card (purchased in June 2015 for $18) was used. It has 2 USB ports, 1 100Mb/s Ethernet interface and 1 HDMI port. For reasons of economy it does not have a Real Time Clock (RTC). Instead, the Pi is intended to be connected to the Internet via Ethernet or WiFi, updating the time automatically from the global ntp (nework time protocol) servers (see https://learn.adafruit.com/adding-a-real-time-clock-to-raspberry-pi/overview).
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