WINGONEER Micro USB DC 5V 2x3W Bluetooth Audio Receiver Digital Amplifier Board Module Bluetooth Audio Receiver Amplifier Board

Gikfun 2" 4Ohm 3W Full Range Audio Speaker Stereo Woofer Loudspeaker for Arduino (Pack of 2pcs) EK1725

Icstation Bluetooth 4.2 Stereo Audio Receiver Board Amplifier 2x5W Mini Amp Module 3.7-5V for Portable Wireless Speaker DIY

DROK Portable Wireless Bluetooth Audio Receiver Board, Support TF Card USB Decording Play, Bluetooth Stereo Music Transmitter Module for Headphones HIFI Amplifier

KNACRO 3W+3W Wireless Bluetooth 4.0 Audio Receiver Steady Digital Amplifier Board

XCSOURCE 5 pcs 1A 5V Micro USB TP4056 Lithium Battery Power Charger Board Module TE420

Generic Small Surface Bone Conductor Transducer Exciter with Wires 8 Ohm 1 Watt

Makerfocus 10pcs TP4056 Charging Module 5V Micro USB 1A 18650 Lithium Battery Charging Board with Protection Charger Module

eBoot Mini MP1584EN DC-DC Buck Converter Adjustable Power Step Down Module 24V to 12V 9V 5V 3V, 6 Pack

Icstation MT3608 Mico USB DC Voltage Regulator, Step Up Boost Converter, Power Supply Module, 2V-24V to 5V-28V 2A (Pack of 4)

eBoot 5 Pack Boost Converter Module XL6009 DC to DC 3.0-30 V to 5-35 V Output Voltage Adjustable Step-up Circuit Board