TECEVOT4 NFC Bluetooth Wireless Speaker With Enhanced Bass Portable & Rechargeable Built-in Microphone 10W RMS (Blue)

TECEVO T4 NFC Bluetooth Wireless Speaker With Enhanced Bass Portable & Rechargeable Built-in Microphone 10W RMS (Blue)

ZHITING Bluetooth Amplifier Board Module 2x50W Digital Stereo Audio Amp Board Dual Channel DC 5V-27V with HiFi Filter

DollaTek Mini 2.0 Hi-fi Electronic Stereo Audio Assembled Amplifier Portable AMP 10W+10W 2 Channel Class-D DC 12V Digital Booster Amplifier Board Module for CD MP3 MP4 PC Speaker