Materials List

HT8950 DIP-18 IC (There is an alternative option for an HT8950A DIP-16 IC, but it will require you to make slight adjustments to the circuit)

PAM8403 Mini 2 Channel 3W Stereo Class D Audio Power Amplifier Module Board

EEMB Lithium Polymer Battery 3.7V 2000mAh 103454 Lipo Rechargeable Battery Pack with Wire JST Connector for Speaker and Wireless Device

Type C USB LiPo Battery Charger Board with Battery Protection JST Socket with LED Indicator Charging Rate Adjustable Automatic Power-Down

Gikfun 2" 4Ohm 3W Full Range Audio Speaker Stereo Woofer Loudspeaker for Arduino (Any 4Ohm 3W speaker will do)

Adjustable Head Strap