Tekin’s RX4 Brushless Sensored ESC is designed to power your chassis past any obstacle. With massive power handling capabilities, a waterproof* design and all the customization features you’d expect from a Tekin ESC; the RX4 has you covered no matter the situation. Not only reliable, this ESC has a host of built in features like a High Voltage BEC, Drag Brake, Data Logging and the ability to run either Brushed or Brushless motors. The RX4 defines versatility.
The RX4 Housing is a thick-walled, reinforced Hardbox design able to withstand the elements and rough environments that come with true Offroad adventuring.
Rocks, Dirt, Snow, Sand, Mud, Trail and Track; the RX4 is no-limits RC fun.
*Waterproof in sensorless operation only.
Recommended Applications:
ROCK CRAWLING
1.9 & 2.2 Trail
1.9 & 2.2 Rock Race
Specifications:
Controls: Forward/Brake/Reverse
Input Voltage: 2S-4S LiPo / 4-12S NiMH-NiCD
BEC: 6.0v / 7.4v @ 8amps
Motor Limit Brushless Mode: 2S - 4400kV 4-pole, 3S - 3100kV 4-pole, 4S - 2300kV 4-pole
Motor Limit Brushed Mode: No Limit
Max Current: *240amps per phase
Timing Profiles: 7 choices (on board)
Brushed Modes: FWD Only / FWD-REV / FWD-REV Delay
Brushless Modes: FWD Only / FWD-REV / FWD-REV Delay
Dimensions: 1.6 x 2.0 x 1.4" / 40.6 x 50.8 x 35.5mm
Weight: 2.65oz / 75.5g
*Per Mfg Specs
The best in my opinion 
