PIXAPRO® PRO ST-IV 2.4GHz Flash Transmitter | Essential Photo | Photographic lighting and equpiment
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Specialist in studio lighting equipment and accessories for the Digital, Film and Video industries

PIXAPRO® PRO ST-IV 2.4GHz Flash Transmitter

Product Code: M-060033   Availability: In stock
£59.99 inc. vat

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Product Information

The PIXAPRO PRO ST-IV (equivalent to Godox's XPRO) a 2.4GHz TTL Radio flash trigger system capable of transmitting TTL information between your camera and compatible flashes. The PIXAPRO PRO ST-IV trigger has a transmission range of approximately 100m in an open area, and since the transmitter and receivers use radio waves as opposed to Infra-red, you don’t need direct line of sight and is not affected by bright sunlight which can sometimes cause problems with optical flash trigger systems.

The PiXAPRO PRO ST-IV transmitter features a large backlit Dot-Matrix LCD display, with a new and intuitive user-interface. The ST-IV now gives you the option of working with up to 5 groups (A, B, C, D and E) of flashes simultaneously. Each group can now be easily accessed via the five-dedicated group selection buttons, located at the side of the LCD screen. You can also mix TTL and Manual flashes together in one lighting set-up.

One of the PIXAPRO PRO ST-IV’s new features is its TCM function, which enables you to take a shot in TTL mode to attain the correct exposure and then convert the TTL power levels to display on the LCD as Manual power levels, all from the touch of a single button.

The PIXAPRO PRO ST-IV supports TTL, HSS (High-Speed Sync) Rear-Curtain sync and stroboscopic multi-flash. It also a USB Type-C port to enable you to update the ST-IV’s Firmware as new technologies become available.

The perfect solution for busy photographers who require a reliable TTL radio trigger system, with a quick and intuitive interface.



  • Large Dot Matrix LCD Screen Displaying 5 Groups
  • 5 Individual Dedicated Group Buttons
  • TCM Function – TTL – CONVERT – MANUAL
  • Built-in Zoom Controls
  • Global Adjustment of Group Power Levels (ALL Button)
  • Large Graphic Menu System with Multiple Custom Functions




TTL Flash

TTL Auto flash

Manual Flash Control


Stroboscopic Flash


Radio Frequency

2.4GHz Transmission

Power Supply

2x AA Batteries

Manual Flash Triggering


High-Speed Sync Support


Second-Curtain Sync Support


Flash Exposure Compensation (FEC)

Yes ±3 stops 1/3 stop increments

Flash Exposure Lock (FEL)


AF Assist Beam


Modelling Lamp Control


Flash-Ready Tone Control


Zoom Control

Yes (For flashes with a Zoom feature)

TCM Function

Transform TTL settings to Manual mode

Memory Function

Settings will be stored 2 seconds after last operation and recover after a restart.

Working Range

Approx. 0-100m (In an Open Area)






Large Back-lit LDC Panel

Upgradable Firmware

Yes (Via USB Type-C Cable)

Power Supply

2x AA Batteries



Net. Weight










Delivery Information

Weather Warning!

Due to reported weather conditions, please note there may be some disruptions to delivery services which are out of our control. We would recommend allowing an extra 1-2 working days for your item(s) to be delivered, including next working day and express deliveries. Please note, delivery times cannot be guaranteed and in this instance, postage cannot be refunded.  


When will my item arrive If I order it now?

Order Date (if received before 3pm)

Latest Standard Expected Delivery Date

Latest Express Expected Delivery Date

Thursday 21st Dec

On or before 29th December

Friday 22nd December

Friday 22nd Dec - Monday 1st Jan

On or before Friday 5th

On or before the 3rd Jan

Tuesday 2nd Jan

On or before Friday 5th

Wednesday 3rd Jan

Wednesday 3rd Jan

On or before Monday 8th

Thursday 4th Jan

Thursday 4th Jan

On or before Tuesday 9th

Friday 5th Jan

Friday 5th Jan

On or before Wednesday 10th

Monday 6th Jan

Saturday 6th – Sunday 7th Jan

On or before Wednesday 10th

Tuesday 9th Jan


PLEASE NOTE: All delivery times are not guaranteed and are estimates only.
Due to the busy festive period, some courier delays may incur which are out of our control, therefore we would recommend allowing a few extra days for your items to reach you.
Deliveries will not be made on bank holidays (25th-26th December and 1st January), which also includes weekends.
Most standard orders will be dispatched the same day during regular times, however Next Working Day/Express will take priority and will be dispatched first, therefore Standard delivery dispatch may be delayed

Free UK Standard delivery on orders over £150*


Our Delivery Options

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Returns Policy

Contact Us!

1. EssentialPhoto is committed to the provision of quality and reliable products and outstanding customer service. Buyers are entitled to cancel the order and return the goods within 30 working days for a full refund of the purchase price of the goods, please contact us at customerservice@essentialphoto.co.uk with your order number, within 30 days of your purchase, prior to your return.

Return Form

2. Buyer shall fill out the Return Form, found above. Please include a copy with the return order. Please be aware, an order number must be visible on the return form which is included in with the parcel, this is so your return can be identified when received by our returns department. Please be aware, that missing information on the return form may result in a delay when dealing with your request. Please provide your order numbers and completed return form when you return a product. As mentioned, if the returns form is missing or incomplete, this may delay the refund/replacement process. Please be aware, without the proof of an order number, PiXAPRO/EssentialPhoto hold the right to deny a return request. 


Return Order

3. Buyer shall return the product to our warehouse within 30 working days of the original purchase date as long as it’s still in its original, unopened packaging. Please be aware any missing original packaging, or damage to the item(s) returned may result in the amount due to be refunded being affected. Please ensure the return address does not include the address line "Bradfield House" as any items going to this address will not be returned back to us and we may not be able to retrieve the return. Therefore, as mentioned please ensure the address line is as shown above.

All return products must be packed in well protected or if possible, original packaging including the application form any accessories, manuals, documentation, and registration that was...


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Questions & Answers


The ST-IV trigger can be used with our PRO AC receiver, however this will have to be our 2.4GHz version which can be found here; https://www.essentialphoto.co.uk/product/pixapro-2point4ghz-pro-ac-wireless-16-channel-radio-flash-receiver-only/ This will not work with our first generation of this receiver as it operates on a different frequency.


The ST-IV trigger can be used as a remote shutter release, however, you will also require an ST-III receiver in order to do so.


The first option is best suited for times when you are shooting by yourself. If you have multiple shooters using the same group(s) of lights in this mode, the settings on the lights will change depending on which shooter presses the shutter button last.

The Second option is useful for times when more than one photographer is triggering the same flash group(s) with different cameras. In this mode, the settings on all of the ST-IV triggers will automatically all update themselves, depending on whichever settings were last changed. This mode ensures that all the settings are the same across all ST-IV triggers in the same group.
PLEASE NOTE: The batteries will drain quicker in this mode since each ST-IV unit is constantly communicating with one another.

The App option is for when you are using the phone APP to control the flashes.


Unfortunately this trigger will not allow you to use TTL with the CITI600 manual version, in order to use TTL with this trigger you would need to use our CITI600 TTL.

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