Ranko Acoustics RDP-1080 direct current power plug.  Only gold-plated.  

Non-nickel and non-magnetic coating.  The pursuit of durability, appearance and high-quality sound.   

Suitable for linear power supply, vinyl record player, guitar effect device, set-top boxes, routers and etc.    

If direct current used, please distinguish between the positive and negative power plug, confirmed it is correct before  turn it on.  

Avoid damage to the machine.  If alternating current used. Voltage should not exceed 36V to guarantee personal safety.