This IP-67-rated waterproof, brushless servo is suitable or all types of R/C model including, aircraft, boats and 1/10 to 1/4-scale cars. Sporting a black anodised metal case it's also a precision-engineered thing of beauty that, commensurate with Hitec s entire 'D series, is powered by a 32-bit CPU offering rapid, high resolution response, unprecedented programmability and a wide voltage capability. It's a combination that delivers leading-edge performance for all your radio control needs. The DB961WP is tough too. With incredibly durable steel gears, dual ball bearings and a hardened steel output shaft, it offers mighty torque and the reliability to keep you flying, driving and sailing in even the most hostile environment. Specification: Speed at 6.0V (sec): 0.18 Speed at 7.4V (sec): 0.15 Torque at 6.0V (kg.cm): 55 Torque at 7.4V (kg.cm): 55 Spline (teeth): 25 Input Voltage (V): 4.8 to 7.4