CTEK Comfort Connect Extension Cable is designed to help you reach your CTEK battery charger. High quality and easy to connect. Connections are weather proof. It’s designed to fit MULTI US 3300, MULTI US 7002, US 0.8, CT5 Powersport, MUS 4.3 Polar, MUS 4.3 Test & Charge, MXS 5.0, Lithium US, CT5 Time to Go and MURS 7.0, battery chargers, 8. 2 feet long extension.