HP HV 2 Stage Bike Tire Pump - 2 Stage HP HV 120 PSI Max GIYO bicycle pumps are designed and manufactured by us in Taiwan to be durable and reliable bike pumps you can always rely on when you need them. Portable & Frame Mounted - Engineered for convenience, our mini bike pumps are ultra-portable and can easily fit in a backpack side pocket or be securely mounted on your bike frame using the included frame clip. Easy Pumping with Secure Valve Fit - Our secure valve lock lever is easy to use: Just push the valve over your Presta or Schrader valve and then use the valve lock lever to secure it. This ensures easier and faster bike tire pumping without leakage and wasted effort due to air loss. When you are done pumping you can then use the included frame mount to securely attach the portable bike pump to your bike frame and get going. Ergonomic Features - Our ergonomic design makes for easy pumping in all conditions with our comfortable handle that gives you the right grip for fast and safe pumping. Manufacturer Guaranteed - We are the original manufacturer of these pumps and we offer a direct warranty for your peace of mind on all of our products. If you have any questions about these products, just let us know. 2 Stage HP HV (High Pressure / High Volume) Mini Bicycle Pump - Switchable bicycle pump that can meet the needs of all tire types with our unique double cylinder design.