SpecificationThis keyboard is without Backlit and Pointer!!! Compatible with Dell Latutude E6400 E6410 E6500 E6510 E5410 E5510 E5400 E5500 Precision M2400 M4400 M4500 series laptop. Compatible ModelsCompatible with Dell Latutude E6400 E6410 E6500 E6510 E5410 E5510 E5400 E5500 Precision M2400 M4400 M4500 series laptop. Pay AttentionIf some keys will don't work after installed ,this is not because keyboard is broken but you don't connect well the ribbon cable of our keyboard with your laptop ,pls try to reconnect more times.Many customers solve this problem after did this. We tested every keyboard before shipping ,please be assured the purchase. thanks