This is the Mamba X 25.2V Waterproof ESC and 1406-2280KV Sensored Motor Combo from Castle Creations. Part # 010-0155-09
The Mamba X Crawler edition is Castle's offering for the crawling crowd. They have taken their new 1406 low kv crawler motors and paired it with the high power, ultra reliable Mamba X ESC. This combo is ideal for low speed crawling or trail running in vehicles weighing up to 9lbs on 2s to 4s; it can also be used in more aggressive setups like rock racing and extended hill climbing on vehicles up to 5lbs. Your ESC will come with the V2.02 firmware that has been enhanced for rock crawling and sensored operation.