Duratrax Element 3900KV Sensorless Brushless System By Castle. DTXC3122 The Element 3900kV Brushless System is designed specifically for use with lightweight 1/10 scale 2WD off-road vehicles, including buggies, trucks and short course trucks. The programmable ESC and powerful 4-pole motor mount easily; after installation a simple throttle setup is all you need to get going! Motor: The 4-pole, 3900kV sensorless brushless motor delivers more torque with greater efficiency, to meet the demands of today"s off-road vehicles. Motor Specifications: Dimensions:1.42 x 1.85 in (36 mm x 47 mm) Weight (w/wires):6.54 oz (185.4 g) kV (RPM/V):3900kV Voltage Input:2S MAX Shaft Diameter:0.125 in (3.175 mm) Poles:4 Wires:13AWG Silicone, 6.89 in (175 mm) Connectors:4 mm Male bullet connectors ESC: ESC Specifications: Voltage Input:2S-3S LiPo (7.4V-11.1V); 6-10 NiCd/NiMH (7.2V-12V) BEC:3A @ 2S input Current Rating:up to 100A Dimensions:1.81 x 1.38 x 0.79 in (46 mm x 35 mm x 20 mm) Weight:2 oz (56.5 g) Motor Wires:13AWG 5.3 in (135 mm), including female bullet connectors Battery Wires:13AWG 4.72 in (120 mm), with Deans® Ultra Plug® Receiver Wire:11.0 in (280 mm), with Universal radio connector Motor Limit:on 2S/4200kV Max; on 3S/2800kV Max Protections:low voltage cutoff, thermal protection ESC Programmable Features*: Brake/Reverse Type – sets whether reverse is enabled or not, and how it is accessed. Brake Amount – sets what percentage of available braking power is applied with full brake. Reverse Amount – sets how much power will be applied in reverse, if reverse is enabled. Punch/Traction Control – designed to smooth high power starts and limit punch when you don"t want 100% battery power in every situation. The lower the setting the less throttle change limiting there is; for softer accel...