The lettered side is the cooling side and the unlettered side is the heat dissipation side.
It can work continuously, no rotating parts, no rotary effect, no sliding parts, is a solid piece, no vibration, noise, long life when working, easy to install.
Use: Should be used in a variety of small areas requiring heat dissipation, cooling
Note: connected to the 12-volt power supply piece of the two sides will appear temperature difference, one side cold, one side hot, never in the absence of a radiator for a long time to energize the cooler, otherwise it will cause the cooler internal overheating and burn.
If you have any question about the product, feel free to contact the CNBTR Service and we will try our best to give you a satisfactory answer.