The Quicrun WP 8BL150 G2 ESC provides excellent waterproof and dustproof performance for use in various climatic conditions and harsh environments. The smart freewheeling technology increases efficiency and reduces operating temperature, while the powerful switch mode BEC and multiple protection functions ensure a safe and reliable drive. Use the independent programming port to easily adjust settings without having to disconnect the throttle cable. ESC Features: 150A/950A Sensorless, Sensored Brushless Motor for 1/8 RC. Works with 3-6s Lipo. BEC Output of 6V/7.4V adjustable, continuous current 6A (switch mode). Cooling fan powered by built in BEC. Programming port shared with fan port. Motor Limit with 4S Lipo: 3000 KV. Motor Limit with 6S Lipo: 2400 KV (4274 size motor). Motor Features: Quicrun 4268SL 2600KV G2 wirks iwth 3-4S Lipos. No-load Current: 6.1A Diameter/Length:? =42mm (1.65″) L=68.4mm (2.69″) Weight: 417g Shaft Diameter/Length:? =5mm. 73 Bearing Size (mm): Front=D16xD5xT5 Rear=D13xD5xT4.