Quantity   Component name
2 × HC-05 CSR Bluetooth modules
2 × ATMEGA32U2 Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
1 × 9v Battery Connector
1 × 4x3 Keypad
2 × 3mm LEDs
1 × 1 x 16 Alphanumeric LCD (HD44780 based)
2 × Homemade PCB