Servos are powered by the ESC's output to the receiver. If you're using a higher-strength servo than the ESC can support (usually greater than 20kg), you may experience 'brown-outs' where the radio signal can be interrupted and cause erratic driving. This can be helped by plugging a Glitch Buster into the receiver smoothing the current delivery. However, in some cases, you may need to install an external BEC. The Power HD S range has been specially designed for the high demands required in all classes of racing including 1/10 & 1/8th off road. The latest technology allows these new servo's to operate in SSR mode (Super Speed Response) allowing a natural feel and instant feedback on track. The new design has more accurately machined gears than ever before, offering more precision and reliability to meet the ever increasing demands of the competition racing market. FeaturesLow Profile. Full CNC Machined metal high-grade oxygen shell. 7075+303 Titanium & Steel gearing. Japan NOBLE potentiometer. High pressure brushless. compatible with 6.0-8.4v voltage. Upgraded PCB, support SSR, SUR super high speed mode. Available in two-toned anodised Silver, Red & Gold colours. SpecificationsTorque(6.0V): 11.5 kg-cm (159.7 oz/in). Torque(7.4V): 15.0 kg-cm (208.3 oz/in). Torque(8.4V): 16.5 kg-cm (229.1 oz/in). Speed: 0.072 sec (6.0V) ? 0.060 sec (7.4V) | Speed: 0.050 sec (8.4V). Operating Voltage?6.0 ~ 8.4 DC Volts. Weight: 52.0 g (1.83 oz). Bearing Type?Ball Bearing x 2. Motor Type?Brushless Motor. Gear Type?Titanium & Steel. Operating Temperature: -20?~60? . Working frequency?1520?s / 333hz. Size?41.0 x 20.0 x 26.0 mm ( 1.61 x 0.79 x 1.02 in). ? Learn how to install a steering servo correctly to increase steering performance, and avoid stripping your servo gears out. Power HD Brushless Servo SpecificationsTotal Height (A ) = 32mm. Body Width (B ) = 41mm. Below Mount (C ) = 16.7mm. Above Mount (D ) = 15.3mm. Total Length (E ) = 54.4mm. Total Width (F ) = 20mm. Included items Description. QTY. Silver Storm S15 Low Profile Brushless 16.5kg 8.4v Metal Geared Servo. 1. Hardware Set. 1. Decal Sheet. 1.