VIDEO LINK: David's Sling Background Film From Rafael
Video Link: Fly out test of David's Sling
An anti-missile missile system, very little information is publicly available about the David's Sling. It has been reported that it will be capable of intercepting short and medium range rockets and missiles.
David's Sling is proposed to defend against rockets and missiles with a range of 40-250 km, like Hizballah's longest range weapons: the Iranian Zelzal, the Fajr, and the Fatah 110, as well as extended range Katyushas.
Sources: jpost.com; also tmcnet.com