This is a Halloween version tiny bluetooth speaker. Build cost is very low. I 3d printed the casing of the speaker, also installed all itera parts. So you can make it so easily. Speaker width is 62mm.

Here is the website links of the spear parts :Speaker,Amazon.com_ N-bohang 36 mm Diameter Metal Shell Round Internal Magnetic Speaker 2.5W 8 Ohm, Loud Micro Speaker Replacement,IPX7 Waterproof (Pack of 4) _ Electronics.html

Blutooth+AMP,https://www.amazon.co.uk/Muuoeou-CA-8469-Bluetooth-Amplifier-PAM8403-Green/dp/B0DMJJHLB8https://www.amazon.co.uk/Muuoeou-CA-8469-Bluetooth-Amplifier-PAM8403-Green/dp/B0DMJJHLB8

Battery,Amazon.com_ AKZYTUE 3.7V 702030 380mAh Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with PH2.0mm JST Connector _ Health & Household.htmlAmazon.com_ AKZYTUE 3.7V 702030 380mAh Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with PH2.0mm JST Connector _ Health & Household.html

On off Switch,5pcs On Off Switch Replacement Switch Switch Toys For Special Needs Children Toggle Switch Replacements Plastic Toggle Switches - Walmart.com.html5pcs On Off Switch Replacement Switch Switch Toys For Special Needs Children Toggle Switch Replacements Plastic Toggle Switches - Walmart.com.html

Lithium Battery Charger,Amazon.com_ AITRIP 10pcs TP4056 Type-c USB 5V 1A 18650 Lithium Battery Charger Module Charging Board with Dual Protection Functions (10pcs TP4056 Type-c USB) _ Automotive.htmlAmazon.com_ AITRIP 10pcs TP4056 Type-c USB 5V 1A 18650 Lithium Battery Charger Module Charging Board with Dual Protection Functions (10pcs TP4056 Type-c USB) _ Automotive.html

Thaks,Mahbub