This is the Castle Creations Mamba Micro X Waterproof Electronic Speed Control

FEATURES: For 1/18 scale 2 or 4 wheel drive vehicles weighing up to
2.25lbs (1.02kg)
Heavy-duty BEC (battery eliminator circuit) handles high-draw
digital servos
Adjustable settings include;
Throttle Punch Control
Braking Curve Reverse Type
Drag Brake Motor Type
Auto LiPo Cutoff
Programmable Auxiliary Wire (AUX) allows adjustments to several
settings such as torque control and max throttle from a compatible
transmitter
Profiles can be custom designed on a PC with the Castle Link
PC programming software (software not included, can be
downloaded for free from Castle's website, voucher is included for
free Castle Link Programmer)

INCLUDES: Mamba Micro ESC
Motor Leads with 3.5mm Bullet Connectors
Pretinned Battery Leads (require connector to mate w/selected
battery, 4mm Castle Creations connectors recommended)
On/Off Switch
Receiver Connector
Instruction Booklet

REQUIRES: Compatible Motor and LiPo Battery, recommended battery capacity for
1/18 scale vehicles is 1500mAh, 30C or higher continuous
discharge
Voucher for free Castle Link Programmer

SPECS: Input Voltage Range: Min. 2S LiPo, Max. 3S, 12.6V
BEC Specifications: Adjustable: 5.5V or 7.5V (2A Peak), default 5.5V
Brake: Proportional
Reversible: Yes, with lockout
On/Off Switch: Waterproof
Dimensions: 1.61 x 0.75 x 1.10" (41 x 19 x 28mm)
Weight: 1.20oz (34.01g) without connector