The Profoto D2 1000Ws AirTTL is the fastest monolight on the market. Some of the key features include:
1) High speed sync up to 1/8000 of a second
2) 1.2 seconds recycling to full power
3) 1/50000 of a second flash duration
4) Built in AirTTL like the B1x and B2
5) AC powered only
6) Wattage range 2 to 1000W.