Invincible Marine Battery Meter Made using the highest quality components Performance and quality tested The most trusted name in marine accessories and equipment Built in alternator checker The LED display read out indicates the amount of remaining charge in your battery Leave your worries behind, and enjoy a full day of fishing by avoiding the guesswork of estimating your battery's charge Solidly constructed and extremely compact, this durable meter will easily fit anywhere on your boat Comes with a 1-year warranty