This is the HS-M7990TH Digital, Monster Torque, Programmable Servo from Hitec.
FEATURES: High linearity semi permanent magnetic rotary encoder
2 cell LiPo and 6 cell NiMH compatable
Durable titanium alloy metal gears
Dual ball bearing
12bit high resolution circuirty
Programmable G2 digital amplifier with MOSFET drive (separate servo
programmer sold separately)
Ultra hardness gear shaft
4 axial metal bushings
Heat sink for motor and MOSFET
Water and dust resistant
INCLUDES: One HS-M7990TH servo
One small aluminum single arm servo arm
One small black double servo arm
One medium black double servo arm
One large black double servo arm
One black large single servo arm
One round servo horn
Four rubber grommets
Four brass eyelets
Four 2x16.3mm mounting screws
REQUIRES: Installing in model and connecting to control linkage and receiver
SPECS: Speed: 0.21 sec/60 degrees @ 6.0V
0.17 sec/60 degrees @ 7.4V
Torque: 36.0 kg-cm (500 oz-in) @ 6.0V
44.0 kg-cm (611 oz-in) @ 7.4V
Weight: 79g. (2.78 oz.)
Dimensions: 43.8x22.4x40mm (1.72x0.88x1.57in)
