Troy-Bilt TB4BP EC 32cc 4-Cycle Backpack Blower with JumpStart Technology Operating from the user's backpack, this gas blower is comfortable, yet powerful enough to handle your landscaping needs Up to 150 mph air speed and 500 cfm air volume for blowing large piles of leaves and debris Fully-tensioned multi-material suspension system distributes weight evenly and comfortably between shoulders and hips Backpack design and padded hip belt for reduced operator fatigue; fits the shape of your hips and reduces pressure points Long flex tube allows operator to maneuver around and under objects