The ZOOM AD-16 is an AC power adapter designed for use with Zoom's effects pedals and rhythm machines. Suitable for: RT-223, GFX-1, GFX-3, GFX-5, G2, G2.1u, A2, A2.1u, B2, B2.1u, H4 Description DC/AC current: DC Output current in mA: 500 mA 9 V