High Quality Servo, Big KG Rating, Super Fast Speed, IP67 Waterproof Rated !

Specification
Model: A81BHMW - Black

Operating Voltage: 4.8-8.4 V
Operating speed: 0.115sec/60° @ 6.0V
Operating speed: 0.100sec/60° @ 7.4V 
Operating speed: 0.085sec/60° @ 8.4V 
Stall Torque: 34 kg-cm (473 oz-in) @ 6.0V
Stall Torque: 39 kg-cm (542 oz-in) @ 7.4V
Stall Torque: 45 kg-cm (625 oz-in) @ 8.4V 
Gear: Steel
Motor: BLS
Size: 40*20*37.2mm (1.57 x 0.78 x 1.46 in)
Weight: 83g 
Connector Wire: JR 300 mm

Feature 
Ultra Light Unique Design
High Performance Standard Digital Servo
Fast Cooling Heat Sink Case
Strengthen High Chrome Steel Shaft
Extra Strong Patent Steel Gears
Super Strong Three Ball Bearings
High Efficiency Brushless Motor
Programmable Digital Circuit
Magnetic Sensor Waterproof IP67

Test Video
A81BHMW for throttle and steering on 1/8 Losi Elite: https://www.bilibili.com/video/BV14A411j77P/

Running Video 
A81BHMW for throttle and steering on 1/8 Losi Elite: https://www.youtube.com/watch?v=0kafb5v55pQ&t=6s