Arduino wireless Firecracker system

Package include

• 1 x Arduino Uno SMD
• 1 x 5V singal channel relay
  
• 1x Nichrome heating coil
• 1 x HC-05 Bluetooth module
• 1 x TP4056 charging module
• 3 x 18650 li-ion battery
• 1 x 1S battery holder
• 1 x 2S battery holder
• 20 x F-F jumper wire
• 1x USB cable
• 3x AC wire connector
• 5x 3mm nut bolt