1. Light volume and strong hardness: the outer wall is made of polyurethane and tin foil, so the volume is relatively light; 2. Long service life: all light steel structures are treated with anti-corrosion and painting, which has long normal service life; 3. Thermal insulation: The metal carved board is sandwiched with a thermal insulation layer, which is one of the most thermal insulation building materials in the construction market at present; 4. Waterproof and moisture-proof: There are gusset plates at the joint of the plates without gaps. Polyurethane foam has low water absorption and waterproof and moistureproof properties; 5. Rich lines: A variety of colors can be matched at will. Brick pattern, Stone pattern and marble pattern can be selected. Classic grain rules are unified, suitable for horizontal installation; 6. Convenient construction: The metal carved board sentry box can reduce on-site processing, and the installation is simpler and faster, which can effectively reduce installation costs, speed up construction progress and shorten construction period; 7. Good environmental protection performance: the materials and dry hanging construction of the metal carved board sentry box greatly reduce the use of auxiliary materials (such as mortar, etc.) for on-site construction, and effectively avoid the dust phenomenon on the construction site; Moreover, the metal carved board adopts environment-friendly raw materials (such as the inner polyurethane layer is the same material as the inner insulation layer of refrigerator and air conditioner), which is non-toxic, odor-free and pollution-free, giving green protection and decoration to the building. Purpose of the sentry box: The sentry box is widely used for security duty and parking lot entrance and exit charging system in residential areas, properties, office buildings, shopping plazas, police duty, landscape gardens, highways, enterprises, factories and institutions, etc. Sentry boxes can be divided into common steel structure sentry boxes, aluminum alloy sentry boxes, stainless steel sentry boxes, wooden sentry boxes, metal carved board sentry boxes, light steel keel sentry boxes and so on.The sentry box is a simple mobile house, which can realize the functions of security, charge, service, rest and office. The role of the sentry box is to shelter from the wind and rain, which is also the most basic requirement.