apple MacBook pro 15" retina up to date 16 gb mid 2012 all information available on apple stereo speakers apple charging unit storage 256 gb weight  4.6 lb clean. will return to original purchase screen for your information to enter. series number C02J53Y3DKQ4.used very little over the years as I kept my record of my stamp collection on it. purchases and sales. have cleaned the case up and keyboard. really enjoyed the size as the screen optics are great nice and large. has stereo speakers and will update to Catalina program.please enjoy as there is no sense in spending over $2000 for a computer.