3 to 12 volt DC universal power adaptor (switchable between 3V, 5V, 6V, 7.5V, 9V and 12V), up to 2.5A, with 9 swappable connectors.
Reliable source for an item like this.
3 pack for $19 - https://www.dicksmith.com.au/da/buy/3-pack-dick-smith-3-12vd...
Previous discussions - https://www.ozbargain.com.au/node/315316