Quantity   Component name
2 × Raspberry Pi Pico microcontroller $8 total
2 × HC-05 Bluetooth modules $4.66 total
9 × 6mm push buttons $0.42 total
1 × PSP Thumbstick $2.50
1 × 3.7v Lipo Battery 1200mAh $9.95
1 × USB-C Lipo charger $5.95
1 × PowerBoost 500 Basic $9.95
1 × Power switch $0.95
1 × JST PH 2-Pin cable $0.75