It's basically a combination of the three parts that most commonly fail in a Powerdrive 2 48 Volt Club Car Charger... It includes the relay, diode, and circuit breaker. For $29.99 plus $5.00 shipping. I've found a place to buy this stuff wholesale and I'm trying to resale it all as a kit and make a little money. All parts are top quality OEM components. If you've ever had your charger worked on you know this is an unbelievable price.