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Description
Broncolor Siros 400 S WiFi/RFS 2.1 Monolight400Ws, 9 Stop Power Range 1 10 or Full Stop Intervals Flash Duration: 1 8,000 1 1000 Sec Recycle Time: 0. 02 1. 4 Sec Halogen Modeling Lamp Wi Fi Connectivity and Mobile App Integrated Broncolor RFS 2. 1 Receiver Speed Mode for up to 50 Flashes per Sec USB Connection for Updates Fan Cooled, Integrated Reflector Providing a 400Ws output in a compact design, the Siros 400 S WiFi RFS 2. 1 Monolight from Broncolor is a reliable studio flash unit with Wi
- 400Ws, 9-Stop Power Range
- 1/10 or Full Stop Intervals
- Flash Duration: 1/8,000 - 1/1000 Sec
- Recycle Time: 0.02 - 1.4 Sec
- Halogen Modeling Lamp
- Wi-Fi Connectivity and Mobile App
- Integrated Broncolor RFS 2.1 Receiver
- Speed Mode for up to 50 Flashes per Sec
- USB Connection for Updates
- Fan Cooled, Integrated Reflector
Providing a 400Ws output in a compact design, the Siros 400 S WiFi/RFS 2.1 Monolight from Broncolor is a reliable studio flash unit with Wi-Fi connectivity and a built-in RFS 2.1 receiver for wireless control and triggering. It has a 9-stop power range which is adjustable in 1/10 or full stop increments for great control over light output. The Siros S is also quite fast with a flash duration from 1/8000 - 1/1000second and a recycle time of 0.02 - 1.4 seconds depending on power settings. Additionally, the monolight has a halogen modeling light.
Built into the Siros S is a specialized Speed Mode that speeds up the charging time and flash duration to provide a fast sequence of exposures, up to 50 per second at the fastest setting. Also, the unit has a USB connection for software updates and is fan cooled for temperature control. An integrated reflector and mount are included for adding modifiers to the light.
- When the Siros is connected to a Wi-Fi network, each light can be identified by a different-color LED and can be easily controlled using the bronControl app for smartphones and tablets
- With the integrated Broncolor RFS 2.1 receiver, users can use the RFS 2.1 transmitter for remote control from the camera
- Cut-off technology uses a microprocessor to calculate the flash duration to an output, enabling sequences with up to 50 flashes per second
- Enhanced Color Temperature Control technology adapts flash voltage and duration in order to achieve a constant color temperature over the entire variation range
- Individual power distribution means the unit has controllers for each lamp in order to have greater control over the flash power range
- Speed mode reduces flash duration and charging time while reducing the maximum power in order to achieve a series of rapid exposures without overheating
- Single rotary control for flash power output setting, a slight turn provides 1/10 stops while a "Twist" function allows for whole stops
- Internal discharge when power is reduced
- Grip features double-wall plastic with a special coating for durability and comfort
- Aluminum stand adapter can be used with the handle to function as a built-in floor stand
- Standard sync port and built-in photocell are available for more elaborate triggering setups
- Black aluminum body construction
- Designed and developed in Switzerland
In the Box
Broncolor Siros 400 S WiFi/RFS 2.1 Monolight
- Flashtube
- Modeling Light
- Power Cord
- Limited 2-Year Warranty
| Maximum Watt/Seconds | 400 Ws |
| Control Range | 9 stops in 1/10 or full stop intervals 2-400 Ws |
| Guide Number | With L40 Reflector: f/22 5/10 at 6.5' (2 m) and ISO 100 With P70 Reflector: f/32 5/10 at 6.5' (2 m) and ISO 100 |
| Recycle Time | 100 V, 50 Hz: 0.02-1.40 sec 120 V, 60 Hz: 0.02-0.95 sec 230 V, 50 Hz: 0.02-0.65 sec |
| Flash Duration | Min. Energy: 1/6500 sec (t 0.1) / 1/13000 sec (t 0.5) Max. Energy: 1/1000 sec (t 0.1) / 1/2200 sec (t 0.5) With HS Flash Tube: 1/8000 sec |
| Color Temperature | Max. Energy with P70: 5750 K With HS Flashtube and P70: 5500 K |
| Flash Ready Indicator | Visual and audible |
| User Replaceable Flashtube | Yes |
| Changeable Reflector | Yes |
| Modeling Light | Max. 300 W / 120 V |
| Operating Voltage | Automatic adaptation to mains voltage 100-120 VAC, 50-60 Hz, 5.5 A or 200-240 VAC, 50-60 Hz, 3.5 A |
| Built-in Slave Cell | Yes |
| Fan Cooled | Yes |
| Auto Dump | Yes, when power is reduced |
| Standards | EN60065/EN61000-4-2 EN55015 EN301489-1/EN301489-3 ISO10330 |
| Dimensions | 12.6 x 5.1 x 7.1" (32 x 13 x 18 cm) |
| Weight | 7.1 lb (3.2 kg) |
| Packaging Info | |
|---|---|
| Package Weight | 10.5 lb |
| Box Dimensions (LxWxH) | 13.5 x 9.2 x 8.9" |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
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Product Reviews
★★★★★ 5
Amazing!
Color: Cyano Pink Spicule
This makes my skin feel so smooth. The appearance of my skin also is starting to look a lot better/younger. I've been using it for a week and a half already seeing changes.
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Reviewed in the United States on May 11, 2026
★★★★★ 3
Brightens, doesn't firm
Color: Cyano Pink Spicule
I've been using this for about a month now, every night on my face and neck, hoping to reduce the appearance of wrinkles and tighten some of my skin in that area that seems to be losing elasticity. On my neck, I've honestly noticed no real difference in 4 weeks of continued, consistent daily use. The skin on my face does seem brighter and somewhat less textured than before, but I haven't noticed any change in the issues I was hoping this would resolve, based on the claims and how it was marketed. So... not a bad addition to my skincare, but not the solution I was looking for.
Some have expressed concerns about it tingling or stinging... You can feel something when you apply it, it's almost like the feeling of static electricity, but it's very mild. I wouldn't let that stop you from giving it a try if you were concerned about it. It didn't cause my sensitive skin any breakouts or redness (although I was applying it at night before bed, so perhaps any redness was calmed overnight). I'm going to go ahead and finish the bottle, but based on these results, I probably won't repurchase.
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Reviewed in the United States on May 3, 2026
★★★★★ 4
Decent Product
Color: Cyano Pink Spicule
Not bad for the $ , it makes my skin feel good.
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Really enjoying this product - Big confidence boost
Size: 2.02 Fl Oz (Pack of 1)
I was a little skeptical at first.. I saw a different brand of cyperusrotundus oil circulating on tik tok and was super interested in a natural remedy to treat facial hair. I did some digging and tested this one. I’ve been using it for about a month and I have to say I notice such a big difference in the texture of the skin on my face. I’ve seen some significant improvement in facial hair growth overall!! Im hoping with prolonged use, it will make an even bigger impact - but so far I am very pleased! I use it 2x a day and I’ve been feeling more confident! Would definitely suggest trying this!
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Eliminates facial hair
Size: 2.02 Fl Oz (Pack of 1)
I have been using this nightly and it has eliminated/ thinned facial hair. Smells nice too.
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Reviewed in the United States on April 23, 2026