The servo has a slow start function: it is difficult to see with the eye. The current is relatively large at the moment when the servo is started or reversed. With this function, the life of the servo will be relatively longer; Load blocking protection function: When the servo continues to be blocked or the load blocking angle is 3 degrees for 10 seconds and the current remains at 2.5a or above, the servo starts protection, and the current will drop to the standby state. After the load blocking is released, When the remote control is turned at will, the servo returns to normal. Voltage and current: The servo supports voltage between 4.8V-6.0V, and the BEC is at least 3A or above; Angle range: The remote control defaults to 90 degrees, the maximum is 120 degrees; supports control panel 0.5-2.5ms, angle 180 degrees; Waterproof function: The servo contains screws and a total of 7 waterproof rings. The structure is relatively reasonable. Each waterproof ring is installed in place and cannot be seen on the . The circuit board is brushed with special circuit board transparent glue. The potentiometer is sealed with silicone. Other structures are also used accordingly. waterproof treatment, Scope of application: remote control cars, climbing cars; microcontroller controlled robots, robotic arms, etc.; Upgrade instructions: This model is currently upgraded to stainless steel gears Depending on the batch, the appearance and color of the product , but this does not affect use. Colour:Photo Color Material:Metal+Plastic Package Contents: 1 x Servo 1 x Accessories package Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.