Profoto B20 Duo OCF Flash Head Kit

Flash Unit Power & Light Output

The kit includes two battery powered monolights, each delivering a maximum flash output of 250 Ws. They feature an 11 stop power adjustment range with fine 1/10 stop control steps, giving precise creative control over light intensity for different lighting scenarios. The built in 40 W bi colour LED modelling lamp provides continuous light with adjustable brightness and colour temperature from 2800 K to 7000 K, ideal for combined stills and video use.

Battery & Runtime

Each monolight is powered by a rechargeable 43.2 Wh lithium ion battery capable of approximately 400 full power flashes or up to 50 minutes of continuous LED light on a single charge. Batteries are user replaceable and fully recharge in about 90 minutes using the included chargers, supporting fast workflow on location.

Performance & Flash Characteristics

The B20 units boast fast recycle times, enabling shot to shot readiness in as little as 0.01 seconds up to around 1.2 seconds depending on flash mode and power setting. Three flash modes are provided: Eco for consistent performance and extended battery life, Boost for extra power, and Freeze for ultra short flash duration to help eliminate motion blur. Colour temperature remains stable through the power range for reliable exposure and colour.

Connectivity & Control

Wireless control is supported through built in Profoto AirX on the 2.4 GHz band. This allows remote triggering, high speed sync (HSS), TTL control and group/channel management via compatible Profoto Air triggers, and is compatible with Android and iOS apps (Profoto Camera and Profoto Control) using Bluetooth. The units also have an optical receiver, a 3.5 mm sync port and a USB C service port for firmware updates.

Build, Usability & Accessories

The B20 heads are designed to be compact, lightweight and rugged, with a rubberised exterior that improves grip and durability in challenging conditions. Flash tubes are user replaceable to reduce downtime on set. The units are fully compatible with over 120 Profoto light shaping tools and modifiers, including the RFi series, giving extensive creative flexibility. Each head includes a stand adapter and protective cap.

Key Features

• Compact, robust and lightweight
• Profoto ECO mode - For maximized longevity
• Rubberized surface - For easy setup in any locations
• Optional handle - For easier handling
• Sync port - For wired triggering
• Powerful 40W continuous LED-light with adjustable brightness and color temperature
• User exchangeable flash tubes
• 11-stop power range
• Compatibility with 120+ Profoto light shaping tools including RFi-range
• AirX receiver built-in

• 2 × Profoto B20 OCF Flash Head
• 2 × Profoto OCF Stand Adapter
• 2 × Profoto B-Series Li-ion Battery 4S1P
• 2 × Profoto Battery Charger 3A
• 2 × Profoto Power Cable C7 Long
• 2 × Profoto Protective Cover
• 1 × Profoto Core Backpack II
• Limited 2-Year Warranty

• Maximum energy: 250 Ws total flash output (11‑stop range)
• Power adjustment: 0.1 stop increments across range
• Recycling time: 0.01- 1.2 s typical (Eco/Boost/Freeze modes)
• Flash duration (t0.1): 1/500 -1/11 700 s; (t0.5): 1/1 500 -1/38 100 s (Freeze)
• Colour temperature (flash): 6000 K ±100 K (up to 9000 K in Freeze mode)
• Modelling light: 40 W bi‑colour LED, 2800 -7000 K, 5 000 lm max
• LED dimming range: 1 -100 %
• Wireless connectivity: Profoto Air‑X (2.4 GHz) needs separately available Profoto remote, Bluetooth, 100 m radio range, 6 groups, 100 channels
• Battery: 43.2 Wh Li‑ion, up to 400 full‑power flashes, 50 min continuous LED runtime, 1.5 h charge
• Flash sync ports: 3.5 mm sync, USB‑C (service)
• Mount: Profoto OCF/1/4″‑20 thread adaptor
• Dimensions (with mount): 21 × 16 × 10.9 cm
• Weight: 1.9 kg (with mount); 1.5 kg (without mount)
• Operating temperature: 0 -35 °C