snap-on cover
nounUK /ˈsnæp ɒn ˈkʌvə/
US /ˈsnæp ɑːn ˈkʌvər/
A cover that you press down until it clicks into place.
She put the snap-on cover back on the phone after taking it off.
OTHER MEANINGS
2. A protective lid that fastens with small tabs or clips.
The snap-on cover kept the dust out of the camera lens.
3. A removable panel that attaches without screws.
He replaced the snap-on cover on the battery compartment.
4. A decorative shield that clicks onto a device.
The colorful snap-on cover made her tablet easy to spot.