No Wifi You Just Have To Talk To Each Other Wall Decal DecotherapySEE OUR PRODUCT PHOTOS FOR MORE INFORMATION It's easy to add informative signs to wall using wall decals. Choose designs that are suitable for your space. Decotherapy wall decals are DIY (Do It Yourself) and easy to install. You will receive the package with instructions on how to install. Our wall decals are suitable for smooth and flat surfaces, such as smoothly painted cement or wood walls, glass and mirrors. Our wall decals are removable. 100%