Displays hourly daily weekly and monthly rainfall up to 99.98". Self emptying rain cup. Remote sensor reports rainfall amount to base unit. Monitors outdoor temperatures. Indoor temperature range: 32 to 122F. Outdoor temperature range: -4 to 140F. Rain history bar chart display. Programmable temperature alert. 12/24 Hour clock and calendar. Up to 100ft transmission range. Low battery indicators. Base station and rain cup each require 2 AA batteries (NOT included).