ETI class 2 IP65 are high quality encapsulated ballasts which increase light performance.
They are ready to be connected since they come with a 2 meter wiring connection to the electricity network, and a 3 meter cable from the ballast to the lamp, which lights up immediately providing more stability to plants, since it avoids initial flicker.
They are designed to allow heat dissipation in the coil.
Note that these ballasts must be set up outside of the grow room. The ETI Clase 2 IP65 ballast comes with a hook for hanging it on the wall.
Furthermore, this ETI Class ballast is IP65 certified, which ensures that it is resistant to dust and water splashes.