- Intelligent shutoff protection: The battery switch uses an intelligent chip to automatically cut power after 120 seconds if voltage drops below 11.8V to prevent battery drain; when voltage climbs above 13.2V, the remote control switch is disabled to avoid accidental shutoff while driving; manual operation required. - Low power and rugged design: Insulated housing protects wiring and supports temperature resistance. Operating temp 22 F to 194 F; standby current 3 mA; rated current 240 A at 12V; shutoff threshold 11.8V ±0.2V; instantaneous current 500 A. - Safety and longevity: Prevents battery drain during long parking, aging wiring, or lights left on. Reduces charging or battery replacement needs and trailer repairs; maximizes battery life and adds theft protection. - Easy installation: Negative terminal connection ensures simple install without modifying original wiring and easy restoration. Compatible with negative pole lengths 913 mm or 1517 mm; not suitable for small vehicles with stake heads. Power off before installation. - Practical use scenarios: Ideal for long-term storage of cars, RVs, and trailers; fleet or taxi vehicles to prevent idle drain; seasonal vehicles in winter storage or off-grid camping setups.