This is the Flux Vapor Pro Waterproof Electronic Speed Control from HPI.

FEATURES: For use with Flux Vektor and Flux Warp brushless motors
          Compatible with the Castle Link software, Castle Link USB Cord
            (HPIC0573) required
          Auto LiPo setting detects 2 or 3-cell LiPo usage and sets cut-off
            voltage accordingly
          Thermal protection fail-safe function
          Built-in cooling fan

INCLUDES: Flux Vapor Pro ESC with 13AWG Battery Leads and Deans Ultra Male
            Connector, Universal Receiver Connector, Cooling Fan Connector and
            4mm Female Motor Connectors, Instruction Manual

REQUIRES: Installing in vehicle and connecting to receiver, motor and battery

SPECS:    Dimensions: 1.9 x 1.5 x 1.2" (49.5 x 38.5 x 30mm)
          Weight: 2.29oz (65g)

                                                                   jxs 02/24/12
                                                                         ir/jxs