The Cactus RF60 Wireless Flash features a built-in radio transceiver with a 328' range that is fully compatible with the Cactus V6 system and it is high-powered with a guide number of 183' at ISO 100 and 105mm. The flash is fully manual and has a zoom range of 24-105mm that can be expanded to 18mm with the built-in wide-angle diffuser panel. The unit also has the ability to act as either a wireless slave or master and can have its setting changed remotely via another unit or a V6 radio trigger.