MEKE Meike Mk-ar7 Built-in 2.4g Wireless Remote Control Battery Grip for Sony A7 A7r A7s+GIFT Battery Caddy [GIFT:Battery Caddy]Vertical shooting shutter release 2.4GHz wireless channel with is adopted FSK signal model can more efficiently guarantee the speed, distance and stability. Two lithium batteries (NP-FW50) can be put into the grip, with make it have double power. LCD display. Support screen lock function, support lock display mode. 100 meters remote control