This wall power unit uses an input of 100-240 Volt AC with US plug

Output is 9 Volts DC 

The Center output is Positive , Cable is 2 ft 9 inches in length.

Adapter plug for converting to direct 2 wire output is included

This adapter is used for operating the modeltrainsounds.com  circuit boards with 9 VDC including 

the Auto Reversing Unit, Stop and GO Relay, Automated Signal system and Power Distribution Boards.  

Package include  1 Power Adapter and 1 Plug adapter

Buy it Now      $9.00 plus $4.50 Shipping