A convenient multi-power supply for effects units and pedalboards. With its integrated lithium-ion battery, the Yuer PR-02 power supply can not only be used for sessions away from any power outlet, but also as a remedy for unwanted mains hum. In addition to six 9 V DC outputs with 100 mA, which easily supply classic effects such as distortion, chorus, Flanger or Phaser, the battery power supply offers a 9 V DC output with up to 300 mA for power-hungry digital delays or similar pedals. There is also a convenient USB-A port that can be used to charge a smartphone or tablet, for example.