Brand Sevenoak Model SK-F01E Quantity 1 piece(s) per pack Color Black Material ABS environmental protection material Diameter No Compatible Camera Models Canon EOS 5D Mark II1D Mark IV 7D 60D 600D / Rebel T3i / Kiss X5 550D / Rebel T2i / Kiss X4 500D / Rebel T1i / Kiss X3 Functions Control the focus Other Features Controls focus by use of lens AF motor; Cycles digital zoom 1X / 5X / 10X to aid in focusing; Toggles live view on / off; Constant smooth focus towards infinity; Constant smooth focus towards minimum focus distance; Adjustable focus speed rate. Packing List 1 x Follow focus device (Powered by 2 x AA batteries not included) 1 x USB cable (104cm)