This unit is not a 20V (battery operated) model as listed. This is a pneumatic (compressed air) model. The picture is accurate as you can see the hole for the "male" air hose connector at the base of the handle. Pneumatic nail guns almost always come with a "male" connector already attached, just like the one they sent me. I would have kept it although it wasn't what I wanted because I have a large air compressor. Not only was it the wrong model, but the device was not operational upon arrival. As you can see from the photos, the box was badly damaged in transit and repaired with tape more than once. Gvozdezabivnoy looked like it had been returned before. Luckily, Revain has an easy return process that I've already started.