Manfrotto 850 Motorized Expansion Set
Supplied in sets (one set = 1 passive roller and 1 active motor drive). Heavy duty motor to allow operation of heavy backgrounds (up to 12 kg) Smooth operation thanks to cardan - type clutch Equipped with hall-effect electronic position sensors, enable positioning precision down to 1/3 of a turn. Very easy to install - just plug in jacks. Cable to Main control Unit 1.5 meter length.