This is the Hitec HS-5765MH High Voltage Digital Quarter Scale Servo. FEATURES: For 1/4 and 1/5 scale cars and trucks and large planes Heavy duty metal gears with one metal/resin gear Triple ball bearings Programmable digital amplifier with MOSFET drive INCLUDES: HS-5765MH Servo with 1.6" (40mm) Round Horn, 1.8" (47mm) Single Arm, 2.4" (61mm) Four Point Horn, (55mm) Double Arm, Mounting Hardware and Instructions REQUIRES: Installing in model and connecting linkage SPECS: 6.0V 7.4V Operating Speed: 0.16sec/60° 0.13sec/60° Output Torque: 277.74oz-in (20kg-cm) 347.17oz-in (25kg-cm) Weight: 6.07oz (172.3g) Size: 2.32 x 1.14 x 2.04" (59 x 29 x 52mm) jxs 09/27/11 ir/jxs