Quantity   Component name
1 × Pro Micro - 5V/16MHz $8 USD @electrodragon
1 × BT-1A Bluetooth Receiver $18.70 USD @amazon
1 × Bluetooth V4.0 HM-11 BLE Module $12.95 USD @seeedStudio
1 × Dual motor H-Bridge Driver DRV8835 Driver Carrier $4.49USD @Pololu
1 × ON/OFF Switch Pololu Pushbutton Power Switch SV $6.95
1 × Polymer Lithium Ion Battery - 2200mAh 3.7V $9 USD SeeedStudio
1 × Lithium ion battery 5V 2 boost/charge Lithium ion battery 5V 2.1A USB all-in-one boost charge $10 @aliexpress
1 × Energy Harvester - LTC3588-2 Breakout $35 USD @sparkfun
4 × Ultra Capacitor 2.7V 1F USD 3.50 @Mouser
1 × Latching Solenoid DDT-ML-4.5VDC latching solenoid $15.99 ebay
1 × AC Generator 3-18v ac generator v $10.44 Ebay.
1 × 5W Speaker 5Watt 5V Speaker. (you can always just crack open a nomal Bluetooth speaker)