Paddlewheel attachment will attach to any Smart Troll II probe to ADD SPEED data to the mix. With the Paddlewheel Attachment in place the Smart Troll II Probe transmits depth, temperature and SPEED data. You can use multiple Paddlewheel
Attachments on multiple Probes at the same time.
most common use for this is to have Depth Temp and SPEED readings
from multiple downriggers at the same time. That way you can have the
downriggers at different depths to get a picture of the current at
different depths in the water column.
6 Smart Troll Probes will send SPEED data if they are used along with
the Paddlewheel Attachment.