Features:
The motor provides high torques and high efficiency.
High purity copper windings maximize efficiency.
Maximizing energy conversion, it's of good heat dissipation and long service life.
Balanced and smooth rotor can get best reliability and maximum RPM.
Quick response to throttle operation.
Multiple protect function: cut-off protection of low voltage for lithium or nickel battery, overtemperature protection, loss protection of throttling signal and protection of motor blocked.

Specifications:
Material: Plastic + Metal
Color: As Pictures Shown
Motor Size: Approx. 28 * 38mm / 1.1 * 1.5inch (Diameter * Height)
Motor Shaft Size: Approx. 3.175 * 15mm / 0.1 * 0.6inch (Diameter * Length)
Motor KV: 3800KV
Motor RPM: 50000

Max Current: 47A
Max Voltage: < 13V

Resistance: 0.0315
Connector: 3.5mm Gold Banana Plug
ESC Specification:
ESC Size: Approx. 36 * 25 * 18mm / 1.4 * 1 * 0.7inch (L * W * H)
ESC Constant Current: 35A 
ESC Burst Current: 120A / 10sec 
Battery: 2 - 3 Li-Po / 4 - 6 Ni-Mh Batteries (Not Included)
BEC: Yes 
BEC Output: 5V / 2A 
Power Connector of ESC: T Male Plug
Motor Connector of ESC: 3.5mm Banana Female Plug  
Type: RC Part
Total Weight: 120g
Suitable Car: 1:12 and 1:14 Model Truck

Package Includes:
1 x 3800KV Motor
1 x 35A ESC
1 x Instruction Book

Note:
There are some measurement error, thank you for your understanding.