12V/24V 300AMP Battery Switch Battery Disconnect Switch Knob Switch Power Switch Main Battery Switch Brass Silver Plated Stud Car Battery Switch 12V/24V 300AMP Main Battery Switch Battery Isolator for Car Truck Yacht Retrofit and Light Commercial Vehicle 12VDC/300Amp continuous current, 900Amp-5 second peak current; 24VDC/150Amp continuous current, 450Amp-5 second peak current The minimum specification of the high-current connection cable is not less than 0AWG or the conductor cross-sectional area is 50mm2. The longer the line, the larger the conductor cross-sectional area of the cable. Otherwise, the heat generated by the cable will be conducted to the switch, causing the switch to burn out or catch fire Compatible: used for DC 12-48V system, isolation and protection of electrical system, can be used alone or locked together with other switches. Its purpose is to eliminate any power consumption of the battery and disconnect the battery safely when the vehicle or boat is not in use. Copper terminal size Copper terminal size: 3/8'' (10 mm) x 2, very easy to install, usually used in automobiles, vehicles, RVs and boats, as well as electrical equipment switches. Using detachable knob and side plate, and with four M4*50mm mounting studs If your car or electrical system will not be used for a long time, you are worried about the parasitic electrical loss of the battery, then you can install a 12V 300Amp battery main switch, a power-off switch. At least it can help you effectively cut off the main power when the device is not in use, to ensure that your device battery will not drain. _x000D_