207439 Model:TR220 Quantity:1 Color:Black Material:ABS + copper aluminum alloy Features:Torque Servos Specification:Torque: 9kg/cm; Operating speed (4.8V no load) 0.15sec/ 60° / (6.0V no load) 0.12sec/ 60°; Operating voltage: 4.8 - 7.2V; Temperature range: 0 to +55'C; Application:360 degree rotatable Digital Torque Servos English Manual/Spec:Yes Packing List:1 x Torque Servo (30cm cable) 4 x Golden screws 2 x Black screws 4 x Silver screws 4 x Black nuts 4 x Different shape rocker arms Dimensions: 1.97 in x 0.79 in x 1.42 in (5.0 cm x 2.0 cm x 3.6 cm) Weight: 1.52 oz (43 g)