Features: This switch eliminates all power consumption from the battery when the vehicle or boat is not in use, safely disconnecting the battery. Brass has excellent electrical conductivity and is tin-plated for greater resistance to oxidation and corrosion. The housing is made of sturdy flame-retardant nylon, which withstands drops and high temperatures and protects power supply from leakage. The indication of the switching equipment is very clear, turn the knob to achieve the effect of on and off. Suitable for yachts, cars, trucks , campers, boats, etc. Features: Model: A1201 Color black Material: Nylon + Brass Screw diameter: 10 mm Rated current: 300?A (12?V) Instantaneous current?: 1000?A (12?V) Package size: 11 * 7.1 * 7.1 cm Package weight: 270g