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The tank level alarm with a bright flashing LED and a loud beeperThe tank alarm grabs attention with a bright flashing LED and a loud beeper when liquid level is too high or too low. Easy to install. Easy to adjust the depth in tank. Stop overfilled or empty tanks for good!Always on duty because it uses uninteruptible battery power.Loud warbling tone cuts through the loudest industrial noise.The tank alarm guards against overfilling or running empty. Easy to install as its battery powered. No wires, no electricians needed. Lithium battery included lasts for years.Uninterruptible battery power