1、Safe Protection: The solar combiner box is equipped with a high voltage lightning arrester and a 15A independent fuse, which provides short circuit protection, no voltage protection, and overcurrent protection for the circuit, avoiding damage to the solar panel and inverter, and preventing malfunctions. 2、Premium Materials: The 4 string photovoltaic combiner box is made of flame retardant PC and ABS materials, which are durable and long lasting waterproof, making it more suitable for outdoor installation. IP65 waterproof rating can effectively prevent adverse weather and ensure good protection of products. 3、Easy to Install: The photovoltaic box is equipped with pre wired cables and ground wires, plug and play, and installation clips, which can quickly fix the box to any regular surface, perfectly saving a lot of time. 4、Convenient Checking: The transparent cover can check the status of the main switch and lightning arrester. This is a surge protection device and lightning arrester that provides lightning protection. Green indicates normal, once it turns to red, it indicates a lightning strike and the lightning protection module needs to be replaced timely. 5、Wide Application: Suitable for various photovoltaic grid connected and off grid power generation systems, compatible with any brand of solar panels and solar connectors. 1 x Solar Combiner Box4 x Male Plug4 x Female Plug2 x Waterproof Joint8 x Core4 x Screw4 x Wall Plug1 x Wrench2 x Washer1 x User Manual Item Type: PV Combiner BoxMaterial: Flame Retardant PC, ABSInput: 2 StringsOutput: 2 StringsProtection Level: IP65Impact Resistance: IK10Cable Input Inlet: PG 2.5-6mm²Output Cable Gland: PG 2.5-6mm². DC Surge Protector: Maximum Discharge Current: 40KAFuses: Approx. 10 x 38mm / 0.39 x 1.5in, 15A