RECHARGEABLE PUCK FAN - This 3.5" puck-shaped fan from Treva is powered by a fully rechargeable battery.  No expense for replacement batteries required! Easily charge it with the included micro USB charging cable.  VERSATILE 3 SPEED CONTROL - Features three speed settings that let you adjust from a light breeze to a strong wind!  STAYS SECURELY IN PLACE - Four non-skid pads on the bottom of this portable cooling fan prevent movement, wobble and noise at high speeds. Stand it securely on desktops, counters, tabletops and other surfaces. KEEP COOL ON THE GO – Can’t sleep without a breeze? No control over the thermostat? This 3.5" fan is perfect for your bedside table and packs easily - taking up next to no space in your suitcase. Perfect for sleepovers, hotel stays, cruises and campsites. HOURS OF RECHARGEABLE BATTERY LIFE - Enjoy hours of cooling refreshment! Run on Low up to 18 hours, Medium up to 9.5 hours and High up to 6 hours.