1.You can contact the customer service. for any question regarding the product.
2.Ask the question in English to get answer faster.
3.Keep your question short and to the point.
安全なチェックアウト

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A part of the review has been auto-translated.
This one is Good
But It didn't work to down a voltage
12v to 30v work
12v to 5v didn't work
Cztery gwiazdki za to że utrzymuje Uout dopuki Uin≤Uout.
Dla moich potrzeb wystarczy (Lampa 24VDC zasilana z akumulatora 12V).
Tips:For questions about your order, place of delivery, product discount, taxation, delivery time, warranty, shipping, payment, exchange rate, and other questions unrelated to the product, please contact customer service.
A part of the QA has been auto-translated.