For canopy, retractable and sectional garage doors (Canopy arm (Quote 17827) is required when fitting to vertically-tracked canopy and dual tracked non-protruding garage doors.) For doors weighing under 80kg. 2 x 3-channel rolling code remote controls. Automatic lamp. Requires installation by competent persons. Chamberlain technical helpline available on 0800 317 847. Specifications: 230V AC. Max. retractable or canopy door height 2.4m, sectional door height 2.125m, max. width 5m.