Siros L monolights are supplied with the RFS 2 module built in. 

RFS 2 module (radio frequency system) 
For RFS 2.1 / RFS 2.2 flash control, the channel (studio address) must correspond to the transmitter's channel. The studio address is set in the menu at position “st”. The lamp channel is defined in the menu under “lamp”. 

With the radio transceiver, you can define and set the individual lamps as you wish. To learn how to do this, please see the operating instructions for the transceiver. The transceiver is not included in the scope of supply as standard. 

Photocell (cell)
The photocell can be switched on and off using the menu function “sync”. When it is active, the blue LED beside the “cell” label is illuminated. After the first flash of a sequence, the active photocell is deactivated, and the blue LED beside the “sync” button blinks. Pressing the “test” button switches it on again. 

Synchro socket
The sync cables, 5 m (16.4 ft) (Art. No. 34.111.00) or 10 m (32.8 ft) (34.112.00), can be fitted to the socket for cable release. 

“test“ button
Using this button, the monolight can be triggered manually. The flash can be triggered as soon as 90 % of the set energy level is reached. The visual “ready” indicator, on the other hand, only illuminates when 100 % is attained.