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. Coming from Power HD is the new design waterproof HV servo LW-30MG. 30kg/cm, with stable performance, high torque, stronger locking force double, less gear slop, double ball bearings, and 25T metal spline, it is ideal for RC crawler,boat, aircraft, etc. FeaturesFull CNC Machined Aluminium body. Power HD Waterproof design. compatible with 4.8-7.2v voltage. Anodised in Blue. Genuine Power HD product. SpecificationsTorque(4.8V): 18.0 kg-cm (250.0 oz/in). Torque(6.0V): 23.5 kg-cm (326.4 oz/in). Torque(7.2V): 30.0 kg-cm (416.6 oz/in). Speed: 0.18 sec (4.8V) ? 0.16 sec (6.0V)? 0.14 sec (7.2V). Operating Voltage?4.8 ~ 7.2 DC Volts. Weight: 62g (2.19 oz). Bearing Type?Ball Bearing x 2. Motor Type?DC Motor. Gear Type?Copper & Aluminium. Operating Temperature?-20?~60? . Working frequency?1520?s / 333hz. Size?40.5 x 20.5 x 39.3 mm ( 1.59 x 0.81 x 1.55"). ? Learn how to install a steering servo correctly to increase steering performance, and avoid stripping your servo gears out. Power HD Servo SpecificationsTotal Height (A ) = 44mm. Body Width (B ) = 40.6mm. Below Mount (C ) = 27mm. Above Mount (D ) = 17mm. Total Length (E ) = 54mm. Total Width (F ) = 20.3mm. Included items Description. QTY. LW-30MG Standard 30kg 7.2v Metal Geared Waterproof Servo. 1. Hardware Set. 1.