iZende Mini Bike Pump with Pressure Gauge &#x2713; BUILT IN PRESSURE GAUGE - Inflate tire to manufacturers recommendations. Prevent damage from over inflation &#x2713; LONG EXTENDABLE HOSE - Less stress on tire stem while attaching and pumping bike tire &#x2713; STRONG ALUMINIUM BODY - Durable Piston allows for a quick & easy pump action &#x2713; PRESTA & SCHRADER COMPATIBLE - Interchangeable valve head allows for quick adaption between two stems &#x2713; MANUFACTURER TESTED - Only quality assured pumps leave from factory. We promise 365 day no questions asked money-back guarantee & replacement warranty.