5.5MM male plug case box holder w cover for 9V battery
High Sensitivity Microphone Electret Condenser Sound Sensor
HM10 CC2541 Serial Bluetooth4.0 BLE Module - iBeacon IOS/Iphone/Android
Keyestudio BH1750FVI digital light intensity sensor module IIC interface
IC Atmega328P-PU UNO R3 main chip for arduino (with Bootloader)