1.&2.Best replacement for a key with broken buttons or worn key case.3 The item is a DIY remote key. Frequency 433MHz4 Replacement smart keyless entry remote key with battery and electronics installed.Product specificationsColour: BlackMaterial: plastic casebutton:3 buttonsReplacement part For KR55WK48801Frequency: 433MhzChip: 4D63-6F 80 bit (Also fits for ID83 Chip.)Fit For:For Ford B-Max (2012 - Present)For Ford C-Max (2010 - Present)For Ford Fiesta (2008 - Present)For Ford Focus (2011 - Present)For Ford Galaxy (2010 - Present)For Ford Grand C-Max (2010 - Present)For Ford Kuga (2011 - Present)For Ford Mondeo (2007 - Present)For Ford S-Max (2010 - Present)Package Contents:1* remote key case1* circuit board1* small keyOnly the above package content, other products are not included.Note: Light shooting 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.