Virtual Wall Halo是自動虛擬牆寵物版
 這個Virtual Wall Halo用一個外套擋住了阻擋信號,
    這個信號叫Fence, 只剩頂部的防撞信號(這個信號叫Halo)
 可以在Halo虛擬牆附近擺放寵物碗防止被Roomba撞擊,
    因套子是沒有阻擋信號發射只有頂部Halo防撞信號,
    所以附近50cm直徑內的碗不會被撞擊,
    而拿開外套就是1個自動虛擬牆
 The Virtual Halo is great for homes with pets.
 It sets up a protective zone, gently guiding Roomba
    or Scooba 450 around your pet's food and water bowls
    to keep the contents intact. Requires 2 C batteries,
    not included
 Compatible with all Roomba 500, 630, 650, 780,
    and 880 Series models & Scooba 450 etc..
 尺寸: W118 H100 / D73 mm (主體尺寸)
尺寸: W135 H105 / D82 mm (包裝尺寸)
 注意: 售價不包括虛擬牆*