Genie boom lift model GTH-644. Powered by a Perkins 99hp turbo diesel engine. 3 speed transmission with 4WD drive line. Enclosed cab with heat. Machine has a lift capacity  rated for 6,000lbs at 44 feet. 4 wheel, 2 wheel and crab steering options as well as body leveling. Operating weight of unit is 21,545 lbs. Hour meter shows 3629.