Features: brand new and high quality The product for shell is made of PC flame retardant material, which is safer to use. Fault indication via red mark in the inspection window. The product is made of precise electronic components, with longer service life and more stable performance. The surge protector is installed at the power end of the electrical equipment to protect the power line from lightning-strikes and surges. The arrester device has built-in overcurrent, overheating and temperature control short circuit technology to ensure safe use. Specifications: Material: Plastic for Shell Model: DC1000V 2P40KA/DC1000V 3P40KA 2P Size: Approx. 4x7x10cm/1.57x2.76x3.94inch 3P Size: Approx. 6x7x10cm/2.36x2.76x3.94inch Package Includes: 1x Surge Protector note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.