This is the Reedy XP SC-450BL ESC from Associated.

FEATURES: Fully proportional forward and break
          Digital high-frequency operation
          LiPo low voltage cutoff mode
          Reverse with reverse lockout mode
          Adjustable drag breaks
          Adjustable throttle profile
          Aluminum heat sink
          Heavy duty silicone wires
          Deans Ultra Plug battery connector
          3.5mm motor connectors
          Ninety day limited warranty through manufacturer

INCLUDES: One XP SC-450BL ESC with Connectors and Instructions

REQUIRES: Compatible motor
          Installation
SPECS:    Cells: 2-3 LiPo, 6-8 NiMh
          On Resistance: 2.5 ohm
          Max. Continuous Current: 45A
          Breaks: Proportional
          Reversible: Yes w/Breaks Only Option
          Low Voltage Cut Off: Adjustable w/Cell Auto Detect
          Motor Limit: 3900kV w/3S LiPo, 6100kV w/2S LiPo
          Overload Protection: Yes
          Set-Up Procedure: Transmitter Based
          Length: 44mm (1.73")
          Width: 38mm (1.50")
          Height: 28mm (1.10")
          Weight: 77g (2.3oz.)
          Power Wires: 14-Gauge Silicone
          Connectors: Battery-Deans, Motor-3.5mm Connectors

                                                                    lmm 6.18.10
                                                                         ir/jxs