Often used while add a new transmitter to the system.
The right hand side transmitter press ↑ (UP) to send out the data. The left hand side transmitter press ↓ (down) to download the deta.
Remember!! the new add transmitter has to press ↓ (down) to download the data from existing transmitter.
SYNC Receiver's data to Transmitter
A video shows how to replace a new Transmitter to use with existing receiver.
SYNC Transmitter's data to Receiver
A video shows how to replace a new receiver to use with existing transmitter.