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LM386 10W Audio Amplifier Board Mono 3.5mm DC 3-12V Volume Control Mini AMP Module Adjustable volume
5Pcs/Lot DC 5-15V Adjustable Mini Electret Amplifier Capacitor Dynamic Microphone Phono Player Amplification Motherboard
ESP32-WROOM-32E WIFI Bluetooth Development Board Single Relay Module DC7-60V for ESP32 Secondary Development Smart Home Wireless - AliExpress