This Bag Heats Up In Under 20 Minutes, And Stays Hot For Hours And Hours On A Single Charge. This Bag With Soothe Away Your Aches And Pains In No Time, Without Any Cumbersome Electrical Cords To Worry About. You'll Wonder How You Ever Got Along Without It.* Bag Measures 8" X 8" X 2" * Take It To Bed To Keep You Warm On A Chilly Night * Designed To Last For Years