We are now offering the Built-In Controllers from our 500W Conversion Kits. 

These controllers are top notch, we got these specifically made for us and asked for "all the bells and whistles".

Namely, this is the most powerful controller we could get in this form factor (500W rated and over 1000W peak power available).

These are also Sine Wave, which is the smoother and quieter variant (compared to square wave). And lastly, these feature all waterproof connections, including rear light connection and can accommodate front light. 

These are particularly made for the Reention DP4C and DP5C battery casings, but may also fit some other Reention Casings (such as DP6C and DP9C).