INTELLIGENT TEMPERATURE CONTROL: The Instachew Trekpod pet carrier backpack utilizes modern technology always to ensure the optimal temperature. When the temperature reaches 25 degrees, one fan turns on automatically. When the temperature reaches 28 degrees, both fans are turned on. The temperature is reduced to 27 degrees. Fans will time out and adjust. This allows your cats and small dogs to travel with you in hot weather and cold! SHOCK REDUCTION: The smart shock absorption system is built into the backplate of the backpack and is designed to the force of your pet’s weight on your body and minimize shock from moving around. Specially designed metal-plated food pads prevent the backpack from falling when placed on the floor. ROBUS POWER OPTIONS: The cat carrier is powered by a 5V USB power bank which doubles as a portal charger if needed! Charge any device with the portable outlet. TINTED WINDOW: The tinted viewing panel allows your pet to enjoy the beautiful scenery while being protected and shaded by the harsh sun. BREATHABLE: The intelligent ventilation system allows for smart, automatic air control dependent on the internal temperature of the bag. This keeps the bag comfortable and breathable, and minimizes noise interference. You can control it by the instachew Infinity app. CAPACITY: The carrier measures 13 inches in length and 17 inches in height. It can support a maximum weight of 17lbs. A perfect fit for your cats and small dog. SATISFACTION GUARANTEED: It is our mission to provide the highest quality products to our customers. In case of any query feel free to contact us at Service@instachew.com for 24/7 customer service.