20 to 50AMPS AUTOMATIC BREAKER. Resets after it cools down. We carry these types in 20, 30, 40 & 50 amp. Comes complete with the battery bracket. Unhook your TMotor or other accessories power lead, hook it to the open post and place the red bracket on the positive battery post. 40 and 50 recommended for all 24 and 36 volt applications respectively.