Universal MULTI-VOLTAGE DC Cable/Adapter 36W (SWITCHABLE 3V To 13.8V)

Comes with 8 DC barrel plug adaptors for a variety of diameters, power supply switchable to provide 3V, 5V, 6V, 7.5V, 9V, 12V and 13.8V.
Voltage selector has sliding cover to avoid accidental voltage changes