VIFLY just released a new 150mm X style racing quad-the X150, this model focuses on speed and power. It adopts 150mm airframe to keep the lightest weight but compatible with 4" propellers. In the market, almost no competitors can put 4"props on 150mm size. The replaceable 4 arms are super-narrow (6mm) and ultra-thick (5mm) that ensure the speed and durability. FEATURES 150mm Class Frame for 4" Propellers Lightweight and high performance, extremely fast Super-narrow (6mm) & Ultra-thick (5mm) 3K Carbon Fiber Arms Faster respond and incredible ability to withstand violent crash Lighter than 250g No FAA registry needed Foxeer Arrow Micro CCD Camera Wide dynamic range, excellent image SunnySky 1406-3300KV Brushless Motors and 4-in-1 BLHeli-S 20A ESCS The large capacity motors combined with 150mm size makes the drone superbly powerful. The 4-in-1 ESC is soldering free and easy to replace. VIFLY User-friendly Designs LED display shows the battery voltage and video transmission channel. One button switches to change the video channel and output power. MORE DETAILS：http://www.viflydrone.com/x150.html PS: We are looking for professional reviews to review this unit. You can reply below or PM me.