Intelligent Battery Sensor 12V - 500AAfter the simple electrical and mechanical integration, the sensor accurately measures the battery voltage, current, and temperature parameters and internally calculates the State Of Charge, State Of Health, and Time Remaining accordingly.Technical Specifications: Operating Voltage - 6-16.5V Operating Current (Permanent) - 155A Max Current - 1500A (500 ms) Power Consumption - 15 mA (normal mode), 120 A (sleep mode) Max Battery Capacity - 249 Ah Operating Temperature - -40AdegC to 155AdegC This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Owner&';s Manual (pdf)