Meike MK-A7R IV Pro Battery Grip For Sony a7RIV a7R4 a7IV a74 a9II Camera With Vertical Shutter Function with Wireless Remote Major function： You can set the delay time, exposure time, interval and the number of sheets photo.Using FSK 2.4G wireless transmission Input frequency, anti-jamming capability Strong signal is more stable. Transmission distance up to 100 meters. Support to： - FSK 2.4G wireless transmission frequencies - Transmission distances of up to 100 meters - Timer Remote function - Clock Display mode - Screen lock key function - Low-power LCD display Suitable for Sony a7RIV a7IV a9II Camera. NOT Include the battery Package include: 1 x Battery Grip 1 x Remote Controller 1 x Instruction Manual 1 x meike warranty card.