VEVOR Dual Battery Isolator, 12V 300 Amp, Manual and Automatic VSR Voltage Sensitive Relay with LCD Screen, Smart Battery Isolator for Lithium & Lead-Acid Batteries, for Car Truck RV UTV ATV Boat free-shipping Fan size: 48 inch

Fan size: 48 inch

Hand-painted black

EN581 certified for safety and durability

Please confirm that the wire diameter and length are identical to your original garage door torsion springs for time-saving replacement

VEVOR Dual Battery Isolator, 12V 300 Amp, Manual and Automatic VSR Voltage Sensitive Relay with LCD Screen, Smart Battery Isolator for Lithium & Lead-Acid Batteries, for Car Truck RV UTV ATV Boat free-shipping Fan size: 48 inchKeep your auxiliary battery charged and ready to start your vehicle instantly without jumper cables, while protecting both batteries from damage with intelligent voltage monitoring. The dual voltage display lets you diagnose electrical issues at a glance, and adjustable delay settings prevent constant switching that wears out your system. 300 amp high current capacity for dual battery systems Manual and automatic voltage sensitive relay modes