This ZAM pack is particuliarly designed for electro-acoustic instruments powered under 6 volts by 4 R6 batteries, such as Takamine*, CoolTube* 1 & 2, on which the original plug socket must be replaced by the plug socket included included in the ZAM CUSTOM-PACK 3. To download the assembly instructions, click here. *Takamine, Cooltube, are registered trademarks. These instruments are given as examples. ZAMPOWER has no business connections with these brands. Content of the pack : 1 ZAM box One 24 volt AC power supply unit. 1 high quality 10 feet jack-jack cable, Senn® or Cordial®. 2 dummy batteries in 9 volts 1 Takamine jack-plug socket 3 screws