It is a 2 button remote key fob case shell cover . The fob case shell cover comes with screw and case but no blade . Best replacement for a key with broken buttons or worn key case . There is NO interior (remote/electronics/transponder chip)unit inside . This item isn't a remote key and it is just a remote key shell case replacement to protect your immobilizer . Specifications: Compatible with: For C1 C2 C3 C4 XSARA For 107 207 307 407 106 206 306 406 Product size: 4 .5 * 3 .7 * 1 .7cm / 1 .8 * 1 .5 * 0 .7in Product weight: . 15g / 0 .52oz Package list: 2 x Key Shell Case Note:Light and different displays may cause the color of the item in the picture a little different from the real thing . The measurement allowed error is +/- 1-3cm .