Product Description: - P125M-5603 500A DC Motor Controller Replacing 1205 1205M-5601 1205M-5603 - Two mode: The first mode:price 550 RMB: 1205-5305 1205-5603 1205-4601 The second mode:price 500 RMB:1204-4201 1204-5305.The default program jut need mode and voltage (36V/48V,optional) It you needs manufacturer to write program,your voltage and accelerator signal ( The accelerators are devided into three frequently-uses kinds:0-5k;0-5v 5-0k). - The 1204M-5305 1204M-5301 controller is a DC series winding motor speed controller, designed as the replacement of CURTIS 1205M-5603 controller (and old CURTIS 1205 controllers like 1205-201, 1205-202, etc.). - Made by a Chinese manufacturer, the P125M-5603 controller is fully compatible with CURTIS programming devices, and the quality had been approved by many vehicle makers. All parameters of P125M-5603 are the same as its original version of CURTIS 1205M-5603 - By defaut, we will deliver the controller with default setting of 48V / 500A / 0-5k (Throttle Type = "0"). For better applying the controller to your system, the buyer should confirm with the seller the battery system voltage and the throttle type (0-5k, 5k-0 or 0 5V). - 1204M-5305 1204M-5301 DC Series Motor Controller - Not CURTIS Product - Replacement of CURTIS 1205M-5601 & 1205M-5603 - 48V 500A - Replacement of Old CURTIS 1205 Controller Key features:Controller Model: 1204M-5305 1204M-5301 (Replacement of CURTIS 1205M-5603) Norminal Battery Voltage (Volts): 36/48 (Two voltage settings are available. The voltage can be set to either 36 volts or 48 volts. By defaut, it is set as 48 volts, with an allowable working range 33-48V. If it is set as 36 volts, the allowable working range is 25-36V). Package List: - 1 x 1205M-5603 48V 0-5k DC Motor Controller Replacing