The kit includes: Bluetooth motherboard*1, bone conduction module*2, charging cable*1, 130mm lithium battery*1.
upgrade to 400mAh battery requires an additional 10 yuan, contact customer service to change price
Bone conduction module click on the picture to buy
The smallest mini amplifier click on the picture to buy
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Reminder: Since it is a DIY product, we will not return or exchange it. But you can rest assured, we will definitely check it before sending it out. If you accept, we will arrange inspection and delivery for you.