Did the power adapter for your Gold's Gym Cycle Trainer 300 C or 300 Ci stationary bike stop working? This Kircuit replacement adapter is here to save your workout. It's a compatible, non-OEM power supply designed to match the voltage and connector your exercise bike needs to run or charge its console. It has a standard AC plug (input: 100-240V) so you can use it anywhere, and the correct DC output tip to fit your machine's port. It's built with safety features like over-charge protection and a built-in fuse. This is a brand new, tested unit that comes with a 1-year service warranty. It's perfect as a permanent replacement for a lost or broken original charger, or as a spare/backup to keep at the office or while traveling. Just plug it into the wall, connect it to your bike, and you're back on track for your next cycling session. A simple, affordable fix to keep your fitness routine going strong.