This full featured 2 function BEMF decoder is designed specifically to meet the needs of Z and N-Scale modelers who are converting their Z and N-Scale locomotives to DCC. It is strong enough for OO scale locos. Included is the auto-adjusting BEMF for outstanding slow speed performance and hassle free set up. Also includes Quiet Drive for super quiet engine performance. Dimensions: 0.245" x 0.525" x 0.11" or 6.22mm 13.34mm 2.79mm