This is the Phoenix Edge Lite 100 Amp 34V Brushless Electronic Speed Control from Castle Creations.

FEATURES
Profiles can be custom designed on a PC with the Castle Link
PC programming software 
User programmable white auxiliary wire can be used for governor gain
input adjustments, serve as an audible beacon after a crash, act as
an RPM output for 3 axis gyros that support RPM sensors, and used
as an ESC or receiver arming lock
One year limited warranty through Castle Creations beginning at date
of purchase

INCLUDES
Phoenix Edge Lite 100 Amp ESC with Instruction Sheet

REQUIREMENTS
Battery and motor connectors of modelers choice

SPECIFICATIONS
Input Voltage: 2S-8S LiPo
Max Continuous Amps at Full Throttle: 100
Dimensions: 1.2 x 2.6 x 0.8 (30.5 x 66 x 21.4mm)
Weight: 3.2oz (91.5g) with wires 1.4oz (41g) without wires
BEC Voltage 5-8v