AC-CD Power Adapter AC 110V-240V to 13.5V DC for GTD Audio Wireless Microphone AC 110-240 Volt to DC 13.5 Volt Power Adapter, It is compatible with GTD Audio wireless microphone It is compatible with GTD Audio wireless microphone G-622, G-788, G-787, G-733, G-522, G-380, U-504, U-35, V-28, B-11, B-22, B-33 and LX-11 Receiver.