Electro-Voice AC Adapter - 120 V AC Input Voltage - 15 V DC Output Voltage
REPLACEMENT 120V/15VDC
Technical Specifications:
Device Supported: Microphone, Transmitter, IntercomInput Voltage: 120 V ACOutput Voltage: 15 V DCCompatibility: 
 Electro-Voice ST-300 Transmitter 
 Electro-Voice Wireless Microphone Systems:
  Telex Transmitters:
  Telex Intercom Systems: