What is IP66, IP67, IP68 ？

IP protection level refers to the ability of the product to prevent dust and water. The IP protection level is composed of two numbers. The first number represents the level of dustproof and foreign object intrusion of electrical appliances. The foreign objects referred to here include tools and human fingers. Do not touch the live parts of the appliance to avoid electric shock. The second number indicates the degree of airtightness of the appliance against moisture and water intrusion.