Protect your vehicle battery, avoid unexpected no-starts, and monitor voltage in real time with this wireless remote car battery isolator switch. Key benefits Prevents battery drain: intelligently disconnects the battery to stop discharge caused by long parking, aged wiring, or lights left on, helping preserve battery life and reduce replacement costs. Safer, dual-mode protection: automatic shut-off at low voltage and controlled behavior at high voltage reduce the risk of battery damage and unintended power loss. Real-time awareness: built-in LED voltage display shows battery voltage instantly so you can check battery health at a glance. Fast, tool-free installation: installs in minutes with included instructions; fits the battery compartment of most vehicles. What it does and how it works Intelligent battery disconnect: the unit isolates the battery when needed to prevent parasitic drain and extend battery life. Dual-mode shut-off protection: If battery voltage ≤ 11.8V, the unit automatically interrupts power to avoid further discharge. If battery voltage ≥ 13.5V, the remote-control function is disabled; the switch can then only be operated manually. This double protection reduces the chance of improper switching during charging. LED voltage monitoring: an integrated LED readout continuously displays current battery voltage so you can monitor status without additional tools. Remote and manual control: wireless remote operation for convenience, with manual override when required. Compatibility, size, and installation Size: 8.5 × 6 × 3.5 cm — compact design suitable for the battery compartment of most vehicle models. No professional tools required; quick installation in minutes using the supplied instructions. Compatible with standard 12V automotive systems (see vehicle-specific fit before purchase). Practical use scenarios Weekend or seasonal parking: leave your car parked for days or weeks without worrying about parasitic drains from alarms, ECUs, or lights. Fleet and service vehicles: prevent battery failures on vehicles that sit idle between jobs and reduce maintenance downtime. Aftermarket electrical setups: isolate the battery safely while installing or troubleshooting accessories without risk of unintended battery drain. Trustworthy performance Real-time LED voltage readout for accurate battery monitoring. Automatic low-voltage cutoff at ≤ 11.8V and high-voltage behavior at ≥ 13.5V provide layered protection. Compact form factor and simple installation make it practical for most cars and common use cases. What’s included Wireless remote-controlled battery isolator switch with LED voltage display and installation instructions. Note: Fits the battery compartment of most vehicle models. Review vehicle-specific requirements and wiring procedures before installation.