Mcoplus LCD Timer Battery Grip for Canon 50D 40D 30D 20D + RC5 Wireless Infrared Remote Vertical shutter with half-press function. More comfortable vertical shooting Doubling the battery capacity of your camera, effectively extend your shooting time Professional edition with vertical-grip shutter-release button, Main dial, AE-L/FE-L button and AF point selector button 1/2" built-in LCD monitor displays information Extra CR1620 coin battery provided to power the LCD