SAE to DIN/AUTO 12V socket adapter with state of charge monitor that plugs directly into your motorcycle, ATV/SxS, car, pick-up truck or boat's 12V powersports - adapter with 24/7 battery status at a blink of an LED SAE connection system fits any SAE standard 2 pin connector, includes in-line seal that mates with OptiMate SAE - premium quality Ideal for 12V lead-acid and 12.8V lithium LFP (LiFePO4) batteries Battery status indication every 3 seconds (LED blinks) Battery status indication for high performance AGM Battery status indication for lithium-ion LFP Fits both auto and bike sockets With weatherproof sealing cap. VOLT TESTER 4LED AUTO/DIN