This is the Hitec HS-7775MG Low Profile Coreless Programmable Digital Servo.
                                                                            
FEATURES: Low profile coreless motor                                        
         Durable metal gears with dual ball bearings                       
         Programmable                                                      
         Water and dust tight                                              
         For use with EP cars, 1/10 scale GP cars, 30-90 class GP helis and 
          600 over class EP Helis                                          
                                                                            
INCLUDES: One HS-7775MG Low Profile Coreless Programmable Digital Servo     
         One 1" (25mm) Round Servo Horn                                    
         One 1 3/4" (44mm) Servo Horn                                      
         One 1 3/8" (34mm) Servo Horn                                      
         One Large X Servo Horn 1 3/4" (44.5mm) end to end                 
         One Small X Servo Horn 1 1/4" (31.75mm) end to end                
         Four 2x14mm Mounting Screws                                       
         Four Brass Eyelets                                                
         Four Black Rubber Vibration Isolators                             
         Plastic Case and Programming Instruction Sheet                    
         Hitec Decals                                                      
                                                                            
SPECS:   Operating Speed: 0.12sec/60° at 4.8V                              
         Output Torque: 7.2kg.cm (99.98oz.in) at 4.8V                      
         Weight: 49g (1.72oz.)                                             
         Size: 40.4mm x 21mm x 25.4mm (1.59" x 0.82" x 1.0")