The Enelca Apollo 12 is an electric underblanket that uses low-voltage power, a mere 12 volts. The blanket is just as thin as a regular bed sheet and because it's machine washable, it's easy to keep clean. The blanket is waterproof, so it won't give off electric shocks when it gets wet. The polyester material is flame retardant. The electric blanket has 4 programmable timer settings of 1, 2, 5, and 9 hours. The Apollo 12 switches off automatically at the end of the selected program. The blanket also has 4 temperature settings. If you selected a higher setting initially, the blanket will automatically drop to setting 2 after 2 hours.