This is the Hobbywing EZRun Max8 G2 Waterproof Brushless ESC w/XT90 Plug.

Efficient cooling system
The frameless fan design is a patented technology.
The rapid transmission of internal heat to the integrated housing radiator are made up of high airflow from the side of the fan and a copper thermal conduction sink on the internal power plate. These
are built into high-reliability thermal systems to ensure that it is always in good thermal condition.

1/8thBrushless System Turbo Technology
The current brushless system is best paired with the EzRun 4278/4268SD G2 to achieve the maximum performance.
The turbo parameter is adjustable from up to 32 degrees and the speed is significantly increased by up to 25%.

Capacitor Thermal Protection
Capacitor thermal protection implemented by the ESC will irreversible damage to the ESC due to overload.

Super Internal BEC
The built-in switch mode BEC with a maximum output of 15A and voltage adjustable from 6V to 8.4V (step:0.1V) allows the use of various standard servos, high voltage servos.

Built-in Big Capacitor
The ESC has three built-in 680uF capacitors, which increases the performance by 74% (870uF) compared to the MAX8 ESC.
The ultra-large capacitors built onto the ESC also ensures users do not need to install external capacitors on their vehicles.

Real-time data & data logging function, easy to get the power running status.
After connecting the OTA module box, turn on real-time data recording
function to access the operating status.

New sensored cable interface
The Max8 G2 ESC is equipped with a new type of sensored cable interface.
It is high recommended to use the motors from Hobbywing as the waterproof protection level is at the highest level (IP67).

Features:
The ESC uses a special process, coupled with an innovative waterproof design, to increase waterproofing and dust-proofing performance in different climates. It is easy to deal with the harsh conditions containing sediment, ice, and snow, water accumulation.
Built-in ultra-powerful switch mode BEC with a continuous current of 6A, an instant 15A, and support for 6V/7.4V/8.4V switching, supporting a wide range of powerful and high-voltage servos.
Equipped with the most advanced and safe electronic switches. The traditional mechanical switch protects and prevent dust, humid and other harsh environments, contact rust, and violent impact (such as flying slope landing) caused by the automatic closure of mechanical switches and other issues.
Support the 32 degree turbo timing setting. When used with the matching motor (such as EZRUN 4278SD), the maximum rpm can be increased by about 25%, easily win your rival. Multiple protection functions: battery low voltage protection, ESC and motor overheat protection, signal loss protection, current protection.
Support LED program card, LCD G2 program box, OTA programmer (Note: optional) to set the parameters of the ESC.

Specifications:
Scale Vehicles: 1/8th
Cont./Peak
Current: 160A / 1050A
Motor Mode: Sensored and sensorless brushless motor
Input: 3-6S Lipo
Motor Limit:
4S Lipo: KV≤3000
6S Lipo: KV≤2400 4278 size motor
BEC Output: 6V / 7.4V / 8.4V adjustable, continuous current 10A (Switch-mode)
Programming Port: shared with fan interface
Switch Mode: Electronic Switch
Capacitor protection: Yes
Waterproof: Yes
Size (L.W.H)mm: 60(L)x48(W)x40.5(H)mm
Weight (g): 192g
Input/Output Input： XT90 Output：6.5mm gold plug（female）