1. 4 in 1 DesignThe multifunctional hamster house is designed to meet all needs of small animals, both practical and entertaining. It contains hamster wheel, automatic drinking bottle, hideout and food bowl. Perfect size for hamster, dwarf hamster, small mice, gerbil and other little animals. 2. Safe MaterialMade of foodgrade plastic and stainless steel, environmentally friendly material, BPA FREE to promise a drink for your little friend, odorless, easy to clean. 3. Quite Running WheelThe wheel's diameter is 7.5' and the runway's width is 2.8'. Silent Hamster wheel brings your little hamster endless running happiness, also brings you a quiet night even if your hamster is on the race track running and the hamster wheel is spinning. 4. 5.3oz/150ml Water BottlePlease check the small animal water bottle daily and after each refill, tap the metal ball at the tip of the spout to ensure proper flow of water. The water bottle is ready to use when bubbles appear when you tap the metal ball.