Donner DPA-1 Pedal Power Adapter Donner 9 Volt Adapter The Donner 9 Volt Adapter works with any device requiring tip negative 9V to minimize or eliminate the need to change batteries. It can also be used to power additional 9V tip negative effects pedals.No Need for BatteriesDealing with a dead battery in your pedalboard can ruin a performance. With the 9 Volt Adapter you can avoid the headaches of a dead pedal by directly powering it.Not Just for PedalsThe 9 Volt adapter isn't just for powering pedals, it can also be used for other manufacturers electronics. The Donner adapter can also be used to power tip negative keyboards.package included：1 x 5 way Daisy Chain1 x Donner 9V Power Adapter Magnet Ring The magnet ring can Reduce the noise dusturtabce.The professional noise isolation performance ensures you a quiet pedal chain condition while you play.absolutely no loss of sound/signal. Smooth sailing and happy shredding! 5 Way Daisy Chain You can run 5 pedals on your pedal board at the same time. you will have no trouble with the sound.It's convenient for you to use different groups of effects. Safety Certification Donner DPA-1 has FCC (Federal Communications Commission) certification and UL (Underwriter Laboratories Inc.) certification, with overload protection, temperature control and short circuit protection.