Tean Echo (analog echo-rev-mult), made in Italy, 197x-198x

Controls: 

• On/Off
• Input Volume, Halo, Tone, Echo Volume
• Echo, Rep, Echo & Rep, Rev, Mult
• Volume OUT (Min/Max)

Connectors: 

• 1/4' Jack Input 40mV 4 veff 47kOm imp (organ-guitar) (instruments-mixer)
• 1/4' Jack Output 15mV 1,5 veff Low imp (organ-guitar) (instruments-mixer)
• Remote Switch

The unit is not powered by battery, but only by external 220V.