A guide number depends on the sensitivity and coverage behind it · review

GODOX TT520II with RT Trigger review

Name: GODOX TT520II with RT Trigger
Brand: GODOX
SKU: B078KGNNY1

An older-generation manual flash sold with a 433 MHz trigger, a diffuser and color filters, for about $51. Its radio is not part of Godox’s 2.4 GHz X system.

By Jean-Benoit Buisson

Everything in one box

The TT520II comes with an RT trigger, a diffuser, color filters, a stand and a bag.

An older radio

Its 433 MHz system predates Godox’s 2.4 GHz X system and cannot talk to it. If you plan to build a Godox kit, the TT600 is the better starting point.

Manual control

Eight power steps from 1/128 to full.

Who it suits

A single off-camera flash for a beginner who will not expand the setup.

What it does well, and what it gives up

Strengths

Trigger, diffuser and filters in the box
About $51
1,014 ratings at 4.5 stars
External power port

Compromises

433 MHz: not compatible with Godox’s 2.4 GHz X system
Manual only
Lower power than the TT600

Specifications

Guide number	33
Wireless	433 MHz receiver with RT transmitter, 16 channels
Power	1/128 to full in 8 steps
Modes	M, S1 and S2
Flash duration	1/300 to 1/20,000 s
Ports	Sync socket and external power port
In the box	Flash, RT transmitter, bag, mini stand, diffuser, color filter set
Amazon reference	B078KGNNY1
EAN	0723610503562

What people ask before they commit

Will it work with a Godox X2T trigger?

No. Its radio is 433 MHz with the RT transmitter. Godox’s X system uses 2.4 GHz.

Is it TTL?

No. It offers manual, S1 and S2 modes. A manual flash fires at the power you set on it. The camera does not adjust it, so you set the exposure yourself with power, aperture and ISO.

What is GN33?

A guide number depends on the ISO and the coverage the maker chose when measuring it. It cannot be converted into watt-seconds, and neither figure is the light that reaches the subject.

Where this one places on its bench

At $51, it is the 5 cheapest of the 10 models in this category published here.

Cheapest on the bench$14
Median$56
Dearest on the bench$349

Our score

8.1/ 10

A complete starter kit, but a dead end for growth. The TT600 is the better buy for most.

The price on Amazon.com

This model is listed on Amazon.com, at ≈ $51 at the last reading. Listed is not the same as in stock: availability changes daily, and the buy box shows the live price.

Details checked on November 2, 2026.

What use this one answers, among photo equipment

Beginners who want one flash and a trigger in a single box.

Accessories stated to fit this body

Listed because the accessory names this body as a fit.

Altura Photo Flash Diffuser 6 × 5 Review

What buyers actually choose

Amazon reports what buyers took in the month before this page was last checked: at least 100.

The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.

Sources

Specifications: the manufacturer sheet for photo equipment and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.

What we judge this photo equipment on

Each amount in a write-up is what the listing showed when that page was written. The figure next to the product is pulled in as you read, and it is the one that counts.