Quantity   Component name
1 × SIM800L GSM/GPRS module with FM radio
1 × SIM800H GSM/GPRS module with FM radio and Bluetooth
1 × ATmega32u4 Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
1 × 8 MHz Crystal Quartz Crystal
1 × 1N4001 diode Rectifiers Vr/50V Io/1A