DUAL BACKGROUND WITH TRIGGERS, TRIGGERS ARE: SHOW1 AND SHOW2 TO SWITHCH BETWEEN 2 PICTURES. FOR USE IN THE BLACK AREA WHEN YOU ADD A DECK OR PATIO TO A ROOM TO GIVE YOU A VIEW. OR TO USE ON A ROUND/CURVED ROOM AS A WALL PICTURE. PLEASE REMEMBER TO TRY BEFORE YOU BUY.....ALL SALES ARE FINAL, NO REFUNDS