The cooling effect is visible: heating affects the grip and causes poor signal and game lag. The tablet radiator is upgraded to quickly cool down and stable operation of the tablet. 18W high-power tablet cooling new competition: full-blooded 18W ultra-high power. Designed for tablets: large-area cooling, coverage, faster diffusion speed, no need to worry about heating for long-term gaming Instructions for Freezing Conditions:To achieve a freezing effect with the phone cooler, please the following conditions are met:Adapter Voltage Requirement: Use an adapter with an output voltage higher than 9V 2A for power supply. Charging Cable Selection: to use the default charging cable provided by us for connection. Room Temperature Condition: Make sure the room temperature during operation is below 25C. Important Warning: Please note that this device is a phone cooler, not a professional ice maker. Avoid operating the device in an unloaded state for a long time in an attempt to achieve a freezing effect, as it may cause damage to the device or pose a safety hazard. If the product is flickering, it means that the power supply is insufficient. You need to use a 9V2A plug to supply power and connect it with our charging cable. This is not a quality issue. Color: As Shown Material: Plastic+Metal Package Contents: 1 x F36 Semiconductor Phone Cooler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.