Cool Blades got an upgrade! Meet&nbsp;Cool Blades 4.0!The 3600mAh Lithium battery in Cool Blades 4.0 is&nbsp;double the power!&nbsp;A stronger battery means a more powerful breeze that&nbsp;lasts 4 hours longer&nbsp;on one charge!The sleek, compact, hands-free, design will make&nbsp;staying cool and looking cool a breeze!DUAL-FANS &amp; 3 SPEEDS Featuring a dual-fan frame with three speed settings: Low, Medium, and High, and corresponding LED indicator lights.FLEXIBLE The flexible silicone nape allows you to adjust the angle of airflow to help you cool off faster.SAFE Fan blades are internal to the device preventing hair or clothing from being caught up in them.STRONG BATTERY A built-in 3600mAh lithium battery is rechargeable by Type-C USB and will yield up to 10 hours usage time on the lowest speed.FEATURES &amp; SPECS:Twin Blade / Dual-Fan FrameHands-free Pendant DesignSoft Flexible Silicone Nape3-Speed ControlLED Indicator lightsLong Battery Life &#8211; 10 hrs. on min. speedType-C USB ChargingLightweight at only 9.6 ouncesInput Power: 5V/1ABattery: 3600mAh LithiumBattery Life: 600-800 cyclesCharging Time: Approx. 4 hrs.AVAILABLE COLORS:&nbsp;Black or White