This is the Arrma Mega Electronic Speed Control for Brushed Motors 12 Turns and Above. FEATURES Compatible with 550 size motors down to 12 turns and powered by a 2S LiPo or a 6-cell NiMH battery, or an 18 turn & above 550 size motor with 3S LiPo or 9-cell NiMH battery power Aluminum heat sink, red in color Handles up to 40A INCLUDES Arrma Mega 12T ESC with Tamiya Battery Connector, Bullet Motor Connectors, Receiver Connector, On/Off Switch and Instructions SPECIFICATIONS Battery Type: NiMH and LiPo ready Input Voltage: NiMH 5-9 cell (6-10.8V) LiPo 2-3 cell (7.4-11.1V) BEC: 5V/2A LiPo Cutoff: 3.2V per cell Dimensions: 1.8 x 1.3 x 1.1" (46.5 x 34 x 28.5mm) Weight: 2.3oz (65g) Battery and Motor Wire Size: 16 gauge Programmable: Yes Battery Connector: Tamiya