Unlike traditional rubber bottle, Heating Gel Pad can be used for 2 , 4 hours continuously after a single charge of 4 mins Auto warm function on completion of charge, Gel Pad automatically disconnects from power on attaining required temp 75 degree. Charge for 8 12 minutes and the gel remains warm for the next 2 4 hours. This makes it the best portablerechargeable heating pad with no smell and no side effects, easy to use and carry. Shock proof charge like mobile anywhere in hotel, train, airport, office,hospital, less electricity consumption for quick relief from - backaches, sprains, muscular and joint pains, abscesses, boils and women related pains. Works great as hand/feet and body warmer also. Easy operation does not require filling of liquid. It contains permanent pre filling solution. How To Use Insert the power cord on the product to the socket and connect to the power. A red light starts immediately showing the heating is in process. After 3 4 minutes the indicator switches off automatically. One can switch off in a few minutes according to the heating requirement. Heat pad is ready to use and once charged will remain hot for another 2 4 hours minimum. Caution Do not use the Heat Pad when it is charging. Before every heating, please check the tightness of the plug. Make sure the power socket is upward, do not charge when the product is tilted or inverted This product is not advisable for children below 6 years.