Bundle-2 Items-Snark SA-1 9v Power Supply and SA-2 Daisy Chain Includes one Snark SA-1 9-Volt Power Supply Includes one Snark SA-2 5 Pedal Daisy Chain Supplies a sure and steady voltage that won't effect your pedals tone Zero hum proprietary noise filtering for absolute silent operation Can power 5 pedals per daisy, up to 15 pedals