Gray Portable Wireless Lift Systems Home › Gray Jacks › Gray Portable Wireless Lift Systems Gray Wireless Portable Lift System WPLS-135 (SET OF 4) 54,000 lbs GRAWPLS-135Regular Price: $32,996.70On Sale For: $29,997.00 Gray Wireless Portable Lift System WPLS-185 (SET OF 4) 74,000 lbs GRAWPLS-185Regular Price: $39,600.00On Sale For: $36,000.00 Gray's wireless portable lift systems have patent pending Wireless Smart Lift Technology. Tablet based touch screen, on-board manuals, videos and internet. 24 Volt system. Medium/light duty application. Fully adjustable carriage - min wheel diameter of 5" - max 24.5". Patent pending down-stop visual safety system. Lift height of 69". Proudly manufactured in the USA and ALI certified.