Mini DC-DC Boost Step Up Converter 3V 3.2V 3.3V 3.7V 5V 9V To 12V Voltage Regulator PCB Board Module Can Set 5V/ 8V/ 9V

Good!

Ok

🙂

Good!

Ok

🙂

Exactly as in the description!!! I recommend the seller, thank you!!!

It arrived on time. I haven't tested it yet.

As described.

Got the module! I think that I bought it very profitably. I have not yet installed it due to the lack of readiness of other components... I took it as a voltage step-up converter to replace the power source, from the "crown" 9v to Li-ion 3.7v.

Already bought it twice. Good board. Not expensive and small. I don't even doubt its functionality.

I order not for the first time, great boards for powering devices from a 3.7V battery.

I already took it and am very pleased. A necessary scarf in some cases. Thanks Joom!!!

The item was missing from the package. I can't say anything more about this.

Adjustable boost converter, good quality, working.

The order was delivered on time. The packaging is not damaged. Thank you very much.

I received the payment, but I haven’t checked it yet, I think it will work.

Fast delivery, well packed. I recommend the seller

The parcel took a long time until I checked whether it was working.

Already bought. Good scarves. Never got a bad one.

Three arrived as ordered, one of them does not work

for powering the tester from 3.8v to 9v is just right

All the goods are excellent, very happy, thank you :)

The module will come in handy, just in case! 👍

All as in the description. Thank you Joom!!

All as in the description. Thank you Joom!!

Thank you. Works as ordered.

Everything works, perfect as ordered!

Product delivered, Everything works!

Good product I recommend to everyone

Good product, quality.

Item received without damage

Everything is fine, I haven't checked it yet.

All whole. Thank you very much!

The board works! I recommend

Too compact module

Load current 0.3A max.

Haven't tried it yet

everything is fine

Corresponds

Otlicnii

All OK. 🙂

Thank you.

Thank you.

thanks

Norm

OK