The BroodMinder-W3 comes 3 different ways.

Fully Assembled - W3FA - Ready to go, just install the batteries and place under your hive.

Partially Assembled & Calibrated - W3PA - Add to your own woodenware,

Unassembled and Uncalibrated - W3UA - We give you the parts, but you do the rest.

For instructions... watch this video and follow instructions in the W3-Assembly Guide . There is additional information in the BroodMinder user guide.