Create a bone conduction Bluetooth speaker for under $4, using an Apple 7P vibration motor as the speaker—ten in total, five for each channel. Adhering it to different surfaces yields varied sonic qualities.

The print requires no supports. Remove the two “ears” from the vibration motor and affix adhesive tape to the back for convenient installation.

【3D-printed bone conduction Bluetooth speaker - Bilibili】 https://b23.tv/4hZWKrq