Connect the USB cable of the gentle heat diffuser and press the ON (-) switch. The timer will start and automatically shut off safely after one hour of diffusion. To restart the timer, simply turn the device back on by pressing the switch again. The integrated white light illuminates automatically upon activation, highlighting the openwork design and transparent engravings. Be careful of burns: the central part of the diffuser becomes hot. Do not touch this surface when the device is switched on. The diffuser should be used away from areas exposed to artificial heat (radiators, convectors, etc.) or humidity (water sources).