Sonoff SV low voltage WiFi wireless DC 5V-24V relay module
NAS Backup - User Guide for VMware vSphere
DAMGOO 50W+50W+100W 2.1 Channel Subwoofer Amplifier Board with Treble and Bass Control, Dual TPA3116 Chip, DC 12-24V, Bluetooth and AUX Inputs, DIY Wireless Speakers AMP Board, Password Free
12V Fan Controller, DROK DC Motor Speed Controller for Brush Motor 7V-60V 20A 420W PWM Driver Board Control 12V 24V 36V 48V Regulator Cooling Fan Dimmer Governor Pulse Width Modulator with Adjust