Sekonic RT-BR Broncolor Module for L-858DSekonic RT BR Broncolor Module for L 858D The Sekonic SE RT BR Transmitter is a user replaceable radio module that fits neatly next to the batteries in the Speedmaster L 858D Light Meter. This transmitter offers wireless radio flash triggering of Broncolor compatible flashes. Key Features: Remotely trigger your broncolor lights up to 30m 100ft away 99 Radio Studio Addresses (1 99), 40 Lamp Addresses (1 40) Easily measure the percentage of flash in