The WR-A10 Wireless Remote Adapter is designed to work with the WR-R10 Wireless Remote Controller (transceiver), allowing it to be connected to select Nikon D-SLRs with a 10 pin connector, to wirelessly control the shutter release. The WR-T10/WR-R10 + WR-A10 Wireless Remote Adapter units use radio frequencies to communicate; by pairing together a WR-T10 and one or more WR-R10 units.