130cm cable,this cable can replace 9V AA+AAA Battery,cut the 5.5x2.1mm jack and connect to your devices.
2.5V-15V to 3.3V 5V DC-DC Step Up Step Down Automatic Buck-Boost Module
Miniature Electronic Buzzer / Sounder 2v to 15v with Flying Leads
4 channel 12v to 3.3v 5v PC817 input optoisolator optocoupler with connectors
Voltage Regulator AMS1117 DC 5V to 3.3V 800mA Step-Down Vertical Module
DC Buck Step down Adjustable Voltage Regulator 5v~24v to 3.3v 12v 3A | SEE DESC
