• Bright LEDs flash LO BATT warning at 50% charge remaining (12.5 Volt or lower).
• Works best on sealed 12V Absorbed glass matt (Yuasa YTX, YTZ and similar, OptiMa, Odyssey, North Star) or GEL hi performance batteries.
• Draws less than 1mA when flashing.
• Industry standard SAE 2-pole connector.
• SAE charge port allows charging whilst remaining connected to battery lead.
• Length=3″ / 7.5cm. 
• Premium LED product designed by TecMate. 3-year limited warranty.

Check it out in TecMate website.