Please read the instruction manual carefully before use and use it correctly according to its content.Three Speed Temperature Control：Long press the switch for 3 seconds to turn heater on or off.Temperature ranges from 113°F-149°Fwith 3 levels.3 hours smart timed shutdown.Triple Safety Protection: Leg wamer will automatically shut off by default after being accidentally tilted by more than 45° or after 3 hours of continuous operation.Using the foot support,the foot heater wont easily wobble in use.Easy to Use:Tool-free installation,simply unfo