Features:

The B1 makes it easy to take the flash off your camera, take control and shape light.

With TTL you set the light in a flash. With HSS you control the ambient light no matter how harsh the sun is.

With battery-power and a clever design without cables or cords, you can take the B1 with you wherever you go and put it wherever you want.

Add to that the power, speed and light shaping possibilities that Profoto lights are known for, and you have an off-camera flash that makes great light easy.

• Patented AirTTL technology provides perfect exposure in a flash.
• Cordless design and wireless controls allows you to shoot without any restraints.
• Interchangeable, integrated battery provides up to 220 full-power flashes and tens of thousands at lowest power.
• 500 Ws adjustable in 1/10 f-stop increments over a 9 f-stop power range give you both power and precise control.
• Fires up to 20 flashes a second with flash durations as short as 1/19,000 of a second.
• Patent-pending Profoto HSS is fast enough to keep up with your camera, 10 times as powerful as your average speedlight, and extremely consistent.

Specifications:

• Max energy: 500Ws
• Energy range: 9 f-stops (2-500Ws)
• Energy control increments:1/10 or full f-stops
• Recycling time: 0.1-1.9 (Quick burst up to 20 flashes/second)
• Max modeling light (W):20W LED (Output eqvivalent to 70W Halogen)
• Modeling light control:Off, Proportional, Free (5-100%)
• Mode control: Freeze (shortest flash duration) or Normal (color balance) mode
• Flash duration Normal mode (t0.5): 1/11,000s (2Ws) - 1/1,000s (500Ws)
• Flash duration Freeze mode (t0.5): 1/19,000s (2Ws) - 1/1,000s (500Ws)
• Energy stability Normal mode:+-1/20 f-stop flash to flash
• Energy stability Freeze mode:+-1/20 f-stop flash to flash
• Color stability Normal mode:+-150K over range; +-20K flash to flash
• Color stability Freeze mode:+-800K over range; +-50K flash to flash
• Energy control increments:1/10 or full f-stops
• Guide number @ 2m / 100 ISO with Magnum Reflector: 45 2/10
• Input power supply: Exchangeble Lithium-Ion Battery 14.4V/3Ah
• Battery capacity: Up to 220 full power flashes

Syncronization and Control

• Sync socket(s): 1
• Wire sync voltage: Compliant to ISO 10330 standard
• Wire sync connector: 3.5mm Mini-Phono
• Photocell/IR-slave and switch:Yes
• Radio sync & control: Yes, Built in AirTTL supporting wireless sync control, TTL and HSS. (Requires Air Remote TTL. Sold separately.)
• Radio sync range: Up to 300m (1000ft)
• MAC / PC control: Yes, via optional Profoto Air USB transceiver and Profoto Studio software.

Miscellaneous

• Function display:Multifunction LCD display
• Fan cooling: Yes, thermally controlled fan speed for low noice level.
• Ready signaling: Yes, ready lamp, dim and/or switchable beep sound.
• Auto dumping: Yes
• USB interface: Yes, USB Mini port for FW upgrading
• Quick burst: Quick burst capability of up to 20 flashes per second.

Measurements

• Diameter: 14cm (5.5")
• Length: 31cm (12.2")
• Height: 21cm (8.3")
• Weight: 3kg (Including batteries) 6.6 LBS 3kg (Including batteries)