Lightning 70A Brushless ESC, OPTO, 2-7S.

Lightning 15A Brushless ESC, 2A BEC, 2-3S.

Lightning brushless ESCs feature AUTO CELL DETECT and AUTO CUT-OFF - In other words the ESC will detect the number of cells in the flight pack as well as what type of cell is being used (Lipo or Ni-xx) and will set up automatically.

Specifications
  Type: GX-70A
· Weight: 60g / 2.10 oz
· Size: 68 x 35 x 8 mm
· Constant Current:70A (under good cooling environment)
· Max Current: 90A (for ten seconds)
· BEC: No
· FET No.: 18
· PWM: 8 Khz/ 16Khz
· Input: 6 - 20 Ni-Mh/Ni-Cd or 2 - 7 Lipo

These excellent controllers Feature:
* OPTO
* 8 kHz switching rate
* Automatic motor cut-off
* Very smooth throttle response
* Automatic motor cut-off when battery voltage is low
* Superb operation with INRUNNER & OUTRUNNER motors
* Automatic self-calibrating when you turn on your transmitter
* High frequency brake with non linear hard or limited braking action