This flash delivers professional outcomes while directly incorporating intelligent communication and operability with the Sony a7 IV. Flash compensation, light ratio and other essential flash functions are controlled via the camera's interface with the option to assign a Custom Key to call up the flash system. The Sony HVL-F60RM2 features accessible controls with a four-way controller and control wheel when required. Regardless of the shooting conditions, the Sony HVL-F60RM2 is built tough thanks to the metal shoe foot featuring a rugged side frame to house and protect the camera-flash connection. It also assures dust and moisture sealing for those extreme shoots in the outdoors. In terms of performance, the Sony HVL-F60RM2 boasts a sync speed of up to 1/400 sec shutter speed when paired with the Sony A1. The Sony HVL-F60RM2 delivers reliable sync for 200 consecutive flashes in a 10fps high-speed continuous burst. It features a guide number of 60 and focal range of 24-105mm. It will also match pace with the Sony A1 electronic shutter by punching out 20 flashes per second for more than a second. Alternatively, power it via the Sony FA-EBA1 external flash battery for 20 flashes per second for more than ten seconds.