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after-sale service

Happy Build APP

Happy Build Wechat Public Account


Contact the seller through the channel you purchased and provide proof of missing parts to the customer service.

If there is no effective response from the purchase channel, you can scan the QR code on the left to follow our official public account.

Supply Times

If you have purchased "Happy Build" products, you will enjoy a free supplement opportunity. As the "packaging security code" is used as the purchase proof in the supplement process,

please keep the packaging box of the product. After the first free replenishment opportunity is used,

if you need to apply for a supplement again, you must bear the cost.

Processing Time

The customer service will process your supplement application within 10 working days. If there are special reasons that cannot process in time,

we will notify you by SMS. Please wait patiently.


How to connect the remote control?


How to charge the battery?


How to supply?


How to purchase?


How to use programming APP?


How to view the electronic manual?



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