RRL Stations come standard with a built-in 900 MHz radio module. Also standard is a 6" half wave (2.1 dBi) antenna, six (6) 3.6V AA lithium batteries, and dust caps to protect connections when not in use.
Figure 6-1 RRL Station (pt# 109236)
Note:
See Section 2.2 for connecting dataloggers and Splitters.