The WR-R11a can be triggered by the WR-T10 Wireless Remote Controller (transmitter), a WR-1 Wireless Remote Controller; it can also be used on a designated master camera to trigger up to 64 transceiver units. Three radio frequency channels on the WR-R11a are available for use (5, 10, and 15) to prevent interference when multiple pairings or photographers are shooting in one location.
The WR-T10 is a Wireless Remote Controller (transmitter) that is designed to work with the WR-R10 and WR-R11a/WR-R11b Wireless Remote Controllers (transceiver) to wirelessly control the shutter release on Nikon cameras. The WR-T10 and WR-R11a/b and WR-R10 units use radio frequencies to communicate; by pairing together a WR-T10 and one or more of the WR-R11a/b or WR-R10 units. Photographers can use the WR-T10 to simultaneously release the shutter on multiple cameras that have a WR-R11a/b or WR-R10 unit attached and have been paired with the WR-T10.