The SD is already installed, and the instructions MUST be read since all functionality is accomplished via the single click button. I was shocked how well the motion detection worked over a few different use cases. Also comes with real pen refills and the USB adapter for the SD card. Audio also came through pretty clear. It's nice that the pen isn't too awkwardly wide, so it legitimately looks like a real pen. Also, someone else said that the red light was a giveaway -- however that light is only on in standby mode, so it wouldn't have been blowing his cover if he was using it properly!I walk dogs at a local shelter and like to take photos of the various breeds that I walk. This is difficult with a regular camera or phone with leashes being tugged while attempting to take a photo. The Pen camera makes this easy... just one touch and the photo is taken. I can also let the video recorder run and gerab individual frames later.I got this item to confirm something in my life and it does its job beautifully. This black pen does not give any indication that there is a lens behind the clip. There is, however, a red dot that flashes to let the user know what setting the camera is set to. The red light does go away when the camera is set.Pen works as normal. The box came with a bunch of extra tips too.Picture quality is one of the best I’ve seen. I’ve purchased countless hidden cameras, and this one is the best by far. I do wish it connects to Wi-Fi, but that’s probably beyond our consumer technology now. Overall, I would recommend this product.The pen camera arrived within a day of ordering. I was skeptical at first of how the the video quality would be and after a few practice runs we put the sad card in the computer and was absolutely blown away at how good the video quality is. I definitely recommend this product. It also writes well and comes with extra ink.The camera on this pen is great quality and works in most lit and even dinly lit areas. The microphone gives clear audio and the battery lasts a little over an hour which is impressive given the size of the whole unit. Very easy to use button for the different functions and easy to read instructions. If you dont know what this pen is you would never know it had the camera. Love it!I really like how well this worked. I had bought this to make sure nothing happens around the house while we were on vacation and it did the job well. it’s easy to use and set up and has great quality of capturing everything. definitely would recommend.Would be perfect if it had night vision other than that it does what I needed to and the picture is perfectly clearSo this new hidden camera pen that I've bought has been wonderful. With my profession I needed a camera that had great quality and was it easy to use but could also be hidden very well..I'm so grateful for this it is by far the coolest hidden camera I've ever paid money for..I highly recommend it