I guarantee these to work if used on an MTH set-up. Note pic with security device. If this hasn't been tampered with and this device doesn't work just let me know for a refund. NOTE>> I was told this will only work on a MTH system so if you don't have that please don't order.

Notes from Manufacturer; The ITAD is used to detect trains passing by it to trip signals or accessories. This replaces hard wired detectors like contactors and insulated track sections and does not rely on track power. It also provides an adjustable relay delay and adjustable sensitivity as well. It was made to look like a scale sized railroad control box and it measures 3 inches long and is 2 1/4 inches tall. Years Manufactured: 2000 - 2001