specification: Item Type: Massage Stone + Heater _x000D_Material: Enamel coated steel + powder coated steel + Graystone_x000D_Plug: EU Plug 250V_x000D_ _x000D_Massage Stone Size: Approx. _x000D_11 x 7 x 3cm / 4.3 x 2.8 x 1.2in XL Stone x 1pc _x000D_7.5 x 5.5 x 2.75cm / 3 x 2.2 x 1.1in L Stone x 6pc _x000D_6.5 x 4.5 x 1.75cm / 2.6 x 1.8 x 0.7in M Stone (Hand and arm) x 8pc _x000D_3.75 x 3 x 1.75cm / 1.5 x 1.2 x 0.7in S Stone (Forehead, neck and face) x 10pc _x000D_8 x 3 x 1.75cm / 3.1 x 1.2 x 0.7in Deep Tissue Stone x 2pcs_x000D__x000D__x000D__x000D_Heating Pot Size: Approx. 44.5 x 31 x 23.5cm / 17.5 x 12.2 x 9.3in_x000D__x000D__x000D_Efficacy: Relieve fatigue, relax nerves, beauty and skin care, healthy care_x000D_Applicable Scenarios: SPA clubs, business hotels, beauty salons, beauty centers_x000D__x000D_How to use the heating pot:_x000D_Important explanation: In order to achieve a uniform temperature, it is important to start with the water as close to your set temperature as possible. This prevents the temperature difference_x000D_1. All stones must be cleaned before use_x000D_2. Fill the water tank with hot water and let it stand for 2-3 minutes. Put the stones in a bowl and cover with hot water. Wait 3-4 minutes. These processes can prevent stone or water reservoirs from having a strong cooling effect on the water you added in step 4._x000D_3. Pour out the water in the reservoir. Put a towel at the bottom of the reservoir. This is important to protect the enamel of the reservoir from shedding._x000D_4. Put the stones on the towel in the reservoir. Add hot water. The temperature of most tap water is between 49C and 60C. Before you turn on the heater, you need to check the water temperature with a thermometer. If the temperature of the water is higher than the temperature you require, add a little cold water (stir it with the handle of the spoon to make it mix thoroughly) until it is the same temperature or slightly lower than the temperature you require. If the temperature is low, add hot water. Turn on the heating. When the green light turns on, you need to wait at least 10-15 minutes_x000D_Let the heat penetrate into the center of the stone (it will take 20 minutes if you use a larger stone). If you find that your stone is cooling too fast, allow a longer time. Avoid using water temperature than the set temperature for equipment insulation which may take longer to cool to the set temperature (causing a delay when the green light will indicate that the heater can use), than needed if the water is taken from or slightly below the set temperature._x000D_5. Plug the power cord into a grounded socket_x000D_6. Press the power button to turn on the heater._x000D_7. Press the plus or minus button to select the desired temperature. EU plug-in heaters are in Celsius, and the temperature will increase by 1 degree. Long press for 3 seconds, the temperature will increase by 5C or 10C. If there is no set temperature, after pressing the power button for 5 seconds, the heater will automatically start to work, heating to the lowest temperature of 40 _x000D_8. When the heater is heating up, the "heating" indicator light between the temperature indicators is red. When the required temperature is reached, you will hear a sound and the LED will turn green. Even if the heating element will cycle on and off to maintain the desired temperature, the heating indicator light will remain green._x000D_9. When the required temperature is reached, you need to leave the stone for a period of time to ensure that the heat has penetrated into the center of the stone. The larger the stone, the longer it will take._x000D_10. When moving a stone with a shovel, touch the stone with your fingers and hold it in your hand to see if the temperature is warm._x000D_11. When the hot stone phase is over, press the power button to turn off the heater_x000D_12. Unplug the heater from the wall socket._x000D_13. If you do not unplug the power source, the water heater will automatically turn off after 6 hours._x000D__x000D_Massage stone operation method_x000D_1. Preparation materials: Add pure water to the furnace, drop the essential oil, soak the hot stone in it, plug in the power supply and heat it for about 20 minutes (the temperature can be determined according to the customer's skin bearing capacity, generally not more than 70 degrees Celsius).Heat up the energy stone and put it on the towel._x000D_2. Before going to the spa, go to the shower first. The skin with unobstructed pores can absorb the product better.You can also sit in the infrared light bath room for ten minutes. The infrared function of the capsule can help open pores and discharge the waste from metabolism in the body._x000D_3. Essential oil massage: adjust the light to a soft state, and the masseur will apply the deployed essential oil to the whole body, massage along both sides of the spine from bottom to top with the technique of lymphatic detoxification to relax muscles and m