The EL-Skyport Receiver Plus is easy-to-use, reliable and compatible with other units. The extra hotshoe fitting allows to securely attach speedlights. The EL-Skyport receiver plus works with AA batteries, available everywhere. The new EL-Skyport Receiver Plus has a complimentary role to the transmitter. The receiver enables speedlights and other flash brands to be triggered by the EL-Skyport system.