iPhone 5se will be announced on an event Apple will hold in a few days (March 21).
So far we know that the device will use the Apple A9 chipset (same as the iPhone 6S), but it won't have features like 3D touch.
We have already heard rumors suggesting an 8 MP camera, but now it looks like the 5se will sport the same camera as 6s - 12 MP/4 K.