{"product_id":"ka4-keep-alive-tm-52-x-52-x-45-13-22-x-13-22-x-11-55mm","title":"KA4 Keep-Alive(TM) -- .52 x .52 x .45\"  13.22 x 13.22 x 11.55mm","description":"This KA4 Series Keep-Alive(R) device from TCS is used to supply power to decoders during times of power interruption due to dirty track or problematic track work. The KA4 can power a locomotive for 1-2 seconds over dirty track and power interruptions (depending on the number of lights and efficiency of the motor). The result is that if your locomotive loses electrical contact over a long switch frog or a short stretch of dirty track, it'll keep on running as though the problem didn't exist. KA4 series Keep-Alive units are sized to fit HO and larger locos. Note: for N Scale and small HO locos check out the KA-N1 Keep-Alive. The KA4 Keep-Alive device is part of the line of \u003ca href=\"https:\/\/bit.ly\/745alldecoderandaccy2024K\"\u003eTrain Control Systems decoders and accessories.\u003c\/a\u003e","brand":"Train Control Systems","offers":[{"title":"Default Title","offer_id":53179321680237,"sku":"745-1668","price":31.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0929\/7228\/6317\/files\/745-1668_01_16589bbf-1870-4c69-8288-981e04c5dfb5.jpg?v=1774981733","url":"https:\/\/walthers.com\/products\/ka4-keep-alive-tm-52-x-52-x-45-13-22-x-13-22-x-11-55mm","provider":"Walthers","version":"1.0","type":"link"}