CIOKS 4 Expander is the perfect companion to CIOKS DC7 in case you would like four additional outlets with four selectable voltages on each tap (9, 12, 15 and 18V DC) which can each deliver 660mA at 9V DC. Simply connect CIOKS 4 Expander to your CIOKS DC7 via the courtesy 24V outlet and you are good to go.