This is the Hitec HS-7980TH Mega Torque High Voltage Digital Servo, and is intended for use with any high performance giant scale aircraft, truggies and buggies, fast power boats, the largest aircraft, monster trucks or anywhere else you can use 600+ inch ounces of torque in.
Hitec's strongest servo period, the "Monster Torque" HS-7980TH is designed to operate on a two cell LiPo Pack. Featuring the high resolution "G2.5" 12 bit generation programmable digital circuit and indestructible Titanium gears, The HS-7980TH has the performance and durability you've come to expect from a Hitec servo. Other features in the HS-7980TH include a 7.4V optimized coreless motor, integrated heat sink case, and a top case with two hardened steel gear pins supported by axial brass bushing.
Operating Voltage Range 6.0V-7.4V
Speed: sec/60 °
Torque: @6.0V 500 oz/in (38.0 kg./cm)
@ 7.4V 611 oz/in (46 kg./cm)
Weight: 2.70 oz (76.54grams)