This is a 49cm Specialized Tarmac which has been upgraded all around with Ultegra Di2 10spd (still current E-tube standard), it also has upgraded FSA carbon wing handlebars (40cm) and Thomson X2 road stem, nice Fi'zi:k saddle and the wheels are Fulcrum Racing 5 with good bearings that are round, true and have good high tension.  Just professionally serviced with new Ultegra chain, will come with charger for battery.  The frame is in stellar shape, I am hard pressed to find even a scuff or scrape on it.  Top tube measures out right at 50cm and standover clearance is at 73cm in the middle of the top tube.  There are some nice little touches of bling with a red chris king top cap and red skewers.  The bike as pictured weighs 16.8 lbs

Please note, I try to take close up and clear pictures of all sides and parts of the bike, please do us both a favor and look at them on a real computer screen and not just a mobile device so it's clear what you are getting.