Laxmi narayan or Laxmi Vishnu is idol of lord vishnu and goddess laxmi. Both are husband and wife and couple deity. The goddess laxmi and lord vishnu is seen sitting in coil of ananta sesh nag snake.
Lord vishnu is seen with chakra(wheel) mark,mace,conch(shankha) and blessing from hand.
Whereas mother laxmi is seen with 2 lotus flower in two hand,blessing and dhyana mudra(meditation posture) in hand.