（Materials required）配件表
board木板5.4mmX5.4mmX2mm*2，5.4mmX5mmX2mm*2，5mmX5mmX2mm*2。
Full range speaker 4Ω3W全频喇叭 https://goo.gl/kvi8SU
Mono Bluetooth power amplifier board单声道蓝牙功放板https://goo.gl/SpNb5Q
Passive diaphragm 低音震膜https://goo.gl/RPrFCo
lithium battery 锂电池https://goo.gl/V7oaT2
TP4056C harging module 充电模块https://goo.gl/fXGMrJ
Slide switch滑动开关https://goo.gl/zUUPLF
502 Super Glue 胶水https://goo.gl/4VtPiu
Carving Knife https://goo.gl/jgP4h9
PCB Prototype for $2(Any color): https://jlcpcb.com/

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