Wal-Mart Stores Inc. recalled about 330,000 units of Rival brand electric griddles with model number XJ-14207. The griddles are black and measure 20 inches long by 10.5 inches wide. "Walmart" and the model number are printed on a label molded into the bottom of the griddle.

"Rival" is printed on the outside edge of the griddle and on the griddle's temperature dial. Walmart stores sold nationwide and online at Walmart.com from July 2015 through December 2015 for about $20. Hazard: The heating element can crack and water can get inside, posing a shock hazard when the griddle is plugged into an electrical outlet.

Consumers should immediately unplug and stop using the recalled griddles and return them to any Walmart store for a full refund.