Specifications include, but are not limited to: 2.1.Quantity two (2) - HDT DRASH 4XB Tent Systems 2.1.1.Color O/D Green 2.1.2.One-piece soft wall shelter design constructed in military specs of operating temperatures of -50F to 131F. 2.1.3.Constructed with a Titanite frame with pre-attached Xytex covers, coated with polyester farbric. Fire retardant, mildew resistant and water repellent with abrasion-resistant and UV-resistant fabrics. 2.1.4.Floor space of 13.6’ x 25.6’ and area of 304.2, Exterior LxWxH of 27.3’x15.3’x10.5’. 2.1.5.Total weight of 483 lbs. 2.1.6.No field assembly required. Offload, position, lift, and spread for set-up. 2.1.7.Kit to include shelter, integrated flooring, steel stake set, repair kit, vestibule curtains, push poles, and transport bag. 2.2.Quantity one (1) HDT D-1000B Heater 2.2.1.HDT Drash XB4 D-1000B Rust resistant and shockproof heater. 2.2.2.99,500BTU/H heat at a rate of 880 CFM. 2.2.3.Includes electronic control system to monitor high heat and flameout, operating on an external input of 120 VAC / 60 Hz or 230 VAC / 50 Hz, single-phase power. 2.2.4.Safety protection devices, including a safety shut off switch upon detecting 100 ppms of carbon monoxide content. 2.2.5.12 consecutive hour running fuel tank. 2.2.6.Pre-heated fuel filter bowl for extreme low ambient running temperature as low as -50F. 2.2.7.Weather and light-tight connector system to attach two XB4 shelters.