Functions: The maximum torque can be up to 34.5 kg.cm (6.8V). High-precision stainless steel gear with hard anodizing for better accuracy and longer life. The working speed can reach 0.17 seconds / 60 (6.8V). And the coreless motor offers high speed, amazing efficiency, but low power consumption. A great choice for university professors and students who are interested in developing software for robot parts. Waterproof design, its waterproof is IP66, the steering gear completely can't be afraid of flooding. Specification: Item name: 30KG digital servo Main material: plastic, aluminum alloy, stainless steel Size: 4x4x2cm Weight: 69g Motor: Carbon brush motor Storage temperature: -30 C 80 C Working temperature: -25 C 70 C Working voltage: 4.8 - 6.8V Working speed (5.0V) ： 0.2s / 60 Working speed (6.8V): 0.17s / 60 Torque (5.0V): 29.5 kg / cm Stall torque (6.8V): 34.5 kg / cm Pulse Width Range: 500 2500 μsec Neutral position: 1500μsec Working Degree: 270 3 (500 2500μs) Dead band width: 3 μs Rotation Direction: Counterclockwise (1000 2000μs) Cable length: 285mm Package Information: Size: 8x8x2cm Weight: 75g Package list: 1x30KG digital servo 1 x 25T rocker arm kit.