This item isnt a remote key and it is just a remote key shell case replacement. Key case and uncut key blade only. Not electronic internals.Best replacement for a key with broken buttons or worn key case.Just cut the key blade,take the internal electronic(include immobilizer/transponder chip) from original remote and place them to our key shell,then you are 3 Buttons: Lock/Unlock/TrunkCompatible with:For 307For 308For 407For 607Product size: 6.0 * 3.2 * 1.7cm / 2.4 * 1.3 * 0.7inProduct weight: Approx. 35g / 1.2ozMaterial: PlasticPackage list:1 x Key Shell CaseNote: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.