Since Oct 2014, I've had a headache all day, everyday. A few years ago, my wife bought me an earlier generation of the Eyeris massager. It is fantastic. It took some time learning the buttons so I could get to my favorite settings, but the strength and motion were great. After awhile, I saw other brands coming out with a cooling feature which I would Love to have. I tried the AllJoy, Hubicare, & the Fmalve brands. The Hubicare was uncomfortable on my face, especially on top of my eyeballs. The Alljoy was really cold, almost too cold. But the hot actually singed the skin under my eyebrows. It was very uncomfortable. The fmalve was almost an exact duplicate of the Alljoy, only $40 more expensive. So I elected to finally return to Renpho & got the Eyeris 3 with a cooling gel pack. I haven't tried the pack yet, but I can say Renpho put out another quality product. It fits my face great, it's not over pressuring, or overheating. In fact this has more button combos to control 3 levels of heat, strength, time, etc. After I received it, I noticed the weight scale, a body massager, & a Bluetooth sleep mask in my house are all Renpho and have been great products. I'll never question it again.For the manufacturer, my only R&D recommendation is to have the power button in the same position (left) to be standard across the brand. Bluetooth/sound at top, massage strength at bottom, and heat levels to the right. Please