Stair Ship (TRE-52) Specification: 1) The electromagnetic brake is automatically activated when the caretaker releases the control handle. 2) The seat belt is connected to the power and has to be securely locked for the device to operate. 3) Equipped with an emergency button to stop the movement. 4) Stair Ship can be used with all types of wheelchair including manual wheelchair, children wheelchair and even power wheelchair 5) Wheelchair can easily be mounted / dismounted from the device. 6) SLA (Sealed Lead Acid), maintenance free battery used. 7) Rechargeable with 115/230V electricity and equipped with an auto power cut-off feature when fully charged. 8) Extendable ramp for loading / unloading wheelchairs. 9) No need to install tracks on stairs.