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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You have to use the standard caution because you are working with a certain amount of radio frequency i.e. short wires, bypass capacitors, good power supply.
The result is a fantastic toy to make data transmission over a long distance.
After I received them (3 modules), they did not work at all. I found from many web that they should put a capacitor ( VCC(3V) to GND) to filter power source. After some modification, They worked well.
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.
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