American Freightways ELH Sled #018 ,this is some kind of a Truck driving monitoring and Navigation system ,which looks to probably be very outdated or obsolete ,in comparison to today’s technology ,but it may still be useful to someone ,it has various electronic devices attached to a 15 in x 15 in x 2 in cast aluminum plate or sled ,the electronics attached to it are the following ,a Symbol Technologies Docking Station Model UC04612 might be VC04612 (kinda hard to read) ,a Mobile Integrated Technologies MT450/RIM model R900-2 ,with a large roof antenna connector ,totally weighs about 16 lbs. ,don’t know if it works ? sold as is ,got this from a Melrose Park storage unit purchase a long time ago ,$20.00 obo