25A Brushless Speed Controller
The G series of BESCs have an inbuilt battery cell protector.
By plugging the connector into the batterys charge port the BESC can ensure that the pack is balanced and that the pack never drops below a recomended level. This ensures your pack wont be over-discharged and destroy your battery.
Its the best way to protect your expensive batteries. Considering in most cases your battery costs more than your BESC, its a wise investment to get a guard.

Cont Current: 25A
Burst Current: 35A
BEC Mode: Linear
BEC : 5v / 2A (3A burst)
Lipo Cells: 2-4
NiMH : 5-15
Weight: 32g
Size: 55x24x8mm