The EL-Skyport Transmitter Plus from Elinchrom is the latest evolution of EL-Skyport wireless radio triggers. Sixteen channels are available: 8 in Normal and 8 in Speed mode, with 4 discrete groups for different or sequentially triggered lighting setups at distances up to 656'. Channels 1, 3, and 7 are compatible with all enabled EL-Skyport units while channels 1, 3, 7, 9, 12, 15, 18, and 20 are only compatible with the ELC Pro HD flash head and the ELB 400 battery pack system. A 2.5mm sync socket extends the transmitter's versatility to cameras without hot shoes or for hard-wired flash units. The EL-Skyport Transmitter Plus runs on easily sourced AA batteries.