Redcat Racing 3 Wire 9g Servo for 2.4 GHz Sumo RC Servo 9g for 2.4 GHz Sumo RC (3 wire) RC Car Parts : 24621 Genuine Redcat Racing Parts For troubleshooting and warranty information please contact a Redcat Racing Customer Service Specialist at 602-454-6445 or by emailing amazonsupport@redcatracing.com NOTE: Please read the User Manual before use.