Mcoplus BG-DR7100 Professional Vertical Battery Grip Pack with 2.4G Wireless Remote Control for Nikon D7100 D7200 Camera 2.4G FSK wireless transmission, up to 100M working distance Double shooting time keeps continuous shooting to capture more beautiful photos Perfectly support vertial shot, as easy as horizontal shooting Timer remote function to set the delay and exposure time LCD display , Screen lock function to avoid to press the button accidently