The transmitter module Elinchrom/Phottix for L858D Speedmaster by Sekonic allows radio triggering of Elinchrom (Skyport) and Phottix (Strato) enabled flashes and receptors. For Elinchrom, the transmitter offers the following functions: -flash trigerring -controlling the power level of the flash -modeling lamp On/Off -controlling the power level of the modeling lamp For Phottix, the transmitter offers the following functions: -Selecting the groups and triggering a flash for measurement Requires using a Phottix® Indra, Mitros+ set for StratoTM II reception or flash attached to Phottix® receiver with StratoTM II protocol.