★★★★★ 5
Great product.
Color: Style A：Pink
Great quality. The light is bright and it’s easy to install.
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Reviewed in the United States on May 26, 2026
Train Control Systems KA4 Keep Alive 1668
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Train Control Systems KA4 Keep Alive 1668TCS Keep Alive (KA) devices are used to supply power to decoders during times of power interruption due to dirty track or problematic track work. The KA4 will power an HO Scale locomotive with headlights on for approximately 6 to 20 seconds (depending on the locomotive and the efficiency of the motor). This Keep Alive includes a Blue and a Black w White Stripe wire to attach it to a decoder. Dimensions: . 52 x . 52 x . 45 or 13. 22mm x 13. 22mm x 11.
Quick Dispatch:
Your Train Control Systems KA4 Keep Alive 1668 orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your Train Control Systems KA4 Keep Alive 1668 ships.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.9 ★★★★★
Based on 1104 reviews
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Product Reviews
★★★★★ 5
Pretty in Pink
Color: Style A：Pink
Pretty color, stands out day or night. No problem getting suction cups on, easier if you twist them a little they go right in.
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Reviewed in the United States on June 6, 2026
★★★★★ 5
Legit Product.
Color: Style A：Pink
Looks like the image. Works well.
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Reviewed in the United States on April 7, 2026
★★★★★ 5
Great item!
Color: Style A：Pink
Excellent item, easy to install
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
★★★★★ 5
Works fine for me
Color: Style A：Pink
Everything worked as it should really happy with the fact that it came with a few sticky back tie downs to help keep the cable from swinging around. I'm hoping this one will last longer than my last one. ( Purchased from a different distributor.)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
