SMDV Wired&Wireless Shutter Release RF913 for Sony RM-VPR1 A7II/A7S/A6000/RX100 Professional Wired&Wireless Shutter Release RF913 from SMDV This is for use with Sony RM-VPR1 A7II/A7S/A6000/RX100 The package consists of transmitter, receiver channel pin strap and more with user guide Press the trigger button on the receiver halfway to focus on the subject and press it fully to operate shutter function Manufactured in South Korea