This is the Hobbywing QuicRun Waterproof 8BL150 Brushless ESC.

Features:

• Water-proof and dust-proof for all-weather races.
• External programming port, easy to connect to the Program Card when setting the ESC.
• Proportional brake with 4 steps of maximum brake force adjustment and 8 steps of drag brake force adjustment.
• 9 steps of acceleration (/punch) adjustment from "soft" to "Very aggressive" to fit for different kinds of models, tires and tracks.
• Multiple protections: Low voltage cut-off protection/Over-heat protection/Throttle signal loss protection/Motor lock-up protection.
• One-button (the "SET" button on the ESC) to set the ESC, and easy to reset all parameters to the factory default settings.

Specifications:

Cont./Peak Current/ Resistance: 150A/950A/0.00035?
Motor Type Supported: Sensorless Brushless Motor (work best with QUICRUN Brushless Motor)
Car Applicable: 1:8 Buggy/Monster
Motor Limit: For 4S Lipo or 12 cells NiMH: 4274-size or smaller motor with the KV<3000 For 6S Lipo or 18 cells NiMH: 4274-size or smaller motor with the KV<2400
Battery: 9-18 Cells NiMH; 3-6S Lipo
BEC Output: 6V/3A (Switch Mode)
Size/ Weight: 59.5(L)*48(W)*42(H) / 178g
External Program Port: Available
Working voltage of Fan: From BEC (6V)