2 metal plates: one round plate for non-removable battery doors (stick onto back of phone)， thin plate for removable battery doors (place in between battery and battery door) CD Slot base with turn knob to firmly secure holder Quick-snap technology allows your device to snap onto the holder instantly Device can be positioned to any desired angle Cradle-less， full accessibility to screen Mount your phone securely with the Cellet Extra Strength Magnetic Phone Holder. Featuring an extra strength magnet holder and two metal plates， the mount can hold any sized smartphone securely. Included in package are two magnets: sticky round magnet for non-removable battery doors and thin metal plate for removable battery doors. Featuring quick -snap technology， simply hover the phone onto the holder and it will quickly snap on; your device can be positioned in any desired angle. A turn knob tightens the cd base inside your cd slot， that it will not fall out as you drive. (This item comes with a 1 year warranty. Please visit Cellet's website for more warranty information.)