YO146B Latest upgrade product. Made up of coreless motor， metal gear， double ball bearing and connector wire. Operation speed: 0.17 sec/60 degree (4.8V); 0.14 sec/60 degree (6.0V). Dead band width: 5us. Compliant with most standard receiver connector: generic JR Futaba， Hitec， Sanwa， GWS etc. Great for 50CC/90CC fixed wing helicopters and 26CC/50CC fixed wing helicopters. Power Supply via an external adapter (not included). Temperature range: -30C~+60C. Working voltage: 3.0V-7.2V. Cord length: 30cm. Stall torque: 9.4kg/cm (4.8V)， 11kg/cm (6V). Size: 40.7*19.7*42.9mm. Weight: 55g. Package Details Weight: 77.04 g Size: 6.7*5.2*2.8 cm Package Includes 1 × MG996R Digital Hi-speed Servo 1 × Set of Accessories