Specification:Material: ABS & MetalColor: BlackBlade: HU58 BladeButton: 3 ButtonBattery: Yes (LIR2025 ) Fitment:For BMW E46 E39 E38 3 5 7 Series Z3 M3 M5 Package include:1x Key case 1x Battery3 x Micro switches Feature:- Please ensure your existing key case look like the same as one in the picture.- This key case comes with an uncut blade , you can have the new blade cut at your local locksmith’s or car garage- This does not contain any electronics. you can use your existing transponder chip from your original key.- If your remote key fob has stopped working or you are unable to lock/unlock, the most common problem is that the micro switches stop working after some time of use and this repair kit is exactly what you need to fix the problem- Please note you need some skills to repair the key fob and to solder the switches and battery or it has to be done by a professional auto locksmith. We do not provide any instructions