Monitor cable for Lithium batteries. 60cm long. With M6 / 1/4" ringlets to 2-pin SAE connector with waterproof sealing cap. - Micro processor driven 4 LED system used to monitor battery status. - Informs you if the battery is in a good/needs charge/not good condition - When the engine is running it also informs you if the vehicle''s charging system is working. Then the LED mode changes to an arrow; with the pointer reaching the LED matching the voltage being delivered by charging system. No arrow means there is no charge - A bright red LED warns that the charge level has reached 50% and that it is time to recharge that battery - During vehicle storage the LED matching the battery’s state of charge will blink every 5 seconds; drawing very little power (0.2 milli-amps) to do so; in fact 20-100 times less than the vehicle’s circuitry is drawing from the battery at the same time - Fast blink mode for first 15 seconds after connection to battery; for quick check of multiple batteries (e.g. vehicles on showroom floor)