In direct sunlight, you can see it but not very clear, it needs a cover to keep the sun off the screen. Depending on what the output of your old camera is, (the underwater part), if it is colour or B&W, that's what you will see on the screen. Then again, some camera's won't work with the new screen anyway. Sell the old one and buy a complete new kit. Check their refurbished ones, sometimes there's some good savings. Or, go check the Eyoyo brand, they are pretty good for less money.