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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:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.7 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
great water shoe!
Size: 7 Women/6 Men, Color: 3f-410 Rose Red
I absolutely loved these water shoes! They are surprisingly very comfortable and slip resistant. The sole is very thick and the material is pretty quick to dry. I purchased them for my cruise port excursions and wore them dry, in the water, and walked around after being in the water—no blisters or uncomfortable rubbing. I would say they are maybe a little on the larger side for women. I can range anywhere from a 7, 7.5 to an 8. I purchased a size women’s 7/men’s 6 and it was perfect. I am excited to wear these at the beach and in the creek this summer!
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Reviewed in the United States on April 5, 2026
★★★★★ 5
Great Find
Size: 8, Color: Blue
Cute, comfortable, colorful have soft straps. I was very surprised by the both the quality and comfort of these Flip Flops. The price is so affordable that I bought several pairs in other colors. They are light weight, have ample arch support, fit true to size and can be worn with jeans, short or a casual dress. They really do look just as good as any of the high-priced brands.
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Overall, these are some of the most comfortable flip flops I have owned, and would buy again.
Size: 6.5, Color: White Khaki
I was so happy with these KuaiLu Flip Flops that I bought two more pair, one in black and one in brown! They were comfortable right out of the box and did not need any break-in time. The arch support is excellent and gives my feet much better support than regular flip flops. They are also light weight, well made, and cute enough to wear with many different outfits. The soles have good traction, and they feel sturdy when walking.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Nice Flip Flops for the Price!
Size: 7.5, Color: White Khaki, Size: 7.5, Color: White Khaki
I just received my flip flops and tried them on, and they have a nice cushiony feel to them. The white color matches many of my outfits great. And while the fit is generally good, they could be a bit wider as I have wide feet. But they still feel comfortable.
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Reviewed in the United States on May 18, 2026
★★★★★ 4
runs big
Size: 7.5, Color: Camel
I am always a size 8 in boots, sandals, sneakers and read these ran large so ordered a size 7.5. They are still too big on me. I sent back for a 7 and I will update when I get those. They are very, very cute and comfortable! I love the cloth that goes over the foot!! That makes them seem a bit more fancy than regular flip flops. They also do sound like regular flip flops, so if you want a quiet sandal these are not for you. They are very cushioned and I can def feel the arch support. You will need to size down at least half size and maybe one whole size. The hardest thing for me was to pick a color! May have to get several pair! Just ordered my mom the dark blue and I know she will love them!!! Highly recommend, especially for the low price!
Update: Got the 7 and are still too big. As I said, I got my mom the 6 so I tried them on and they are still a tad too big on me!!! BTW the sizes 8,7.5,7 and the 6 I can hardly see any difference whatsoever! They don't come in 5 1/2 so I am sending the 7 back for a 6 and keeping those just because they are so darn cute and comfortable! I also don't have a very thick foot so I wish the straps were a tad tighter, but I will deal with it. So, to sum up: Be sure to size down at least one size and maybe even two. Returns are easy, so maybe try a few different sizes! I haven't worn a size 6 since I was in about the 6th grade, so not sure what is going on with the sizing. Oh yeah, I did get three different colors and the sizing was the same with all three. HTH! Good luck!
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Reviewed in the United States on March 26, 2026