"The JET 1-Ton, 115/230V Electric Trolley can lift up to a 2000-lb. load. Mounts to 3in. to 5in. I-beams and wide flange beams. Product Type Trolley, Finish Type Powder coated, Capacity lbs. 2,000, Adjustable Yes, Travel Speed ft. per min. 39 3/8, Flange Width in. 3-5, Includes Solenoid operated traveling brake, OSHA Approved Yes, Power Source 115/230v, Phase Single phase. Designed to give single control convenience Features 115/230V, 1 phase wiring specify voltage when ordering Solenoid operated traveling brake Adjustable to fit 5in. min. to 7in. max. I-beam and beam flange widths Must be fitted with a JET 4 station 24V push-button control sold separately Durable powder-coat finish Lug mount or hook pin Electronic trolley not supplied with a 4-button controller 21 7/32in.L x 13 7/8in.W x 12 7/8in.H"