Power HD 2214S Mini Digital servo. FEATURES: All aluminum metal casing in black anodized color.Water Resistant, not water proof. Specs: Torque(4.8V): 0.80 kg-cm (11.11 oz/in) Torque(6.0V): 1.20 kg-cm (16.66 oz/in) Speed: 0.08 sec (4.8V)‚ 0.06 sec (6.0V) Operating Voltage 4.8 ~ 6.0 DC Volts Weight: 14.2 g (0.50 oz) Bearing Type: Ball Bearing x 1 Motor Type: DC Motor Gear Type: Copper & Aluminum Working frequency: 1520μs / 333hz Size: 22.8 x 12.0 x 25.6 mm ( 0.90 x 0.47 x 1.01 in) Servo Arm: 25TNote: When the digital steering gear is subject to resistance will be issued a continuous creak current sound, the greater the resistance sound the more loud, this is a normal phenomenon.