FrSky Xact 5701A 3.2Kg (44 oz in), 0.07 sec - 6.5g

Here is a note from Wayne:

I'd like to point out a few features about this amazing 6mm wide servo. It is a wide voltage unit, 1S or 2S lipo ready. The speed and power of this little servo on 2S is insane. Now add in the hall effect sensor for perfect centering, and all of the amazing telemetry features and this thing is THE WORLD CLASS 6MM servo. Now look at the price! If you aren't happy with this servo, let us know! 

Here is our normal listing:

A high performance, high voltage servo for DLGs, F3K or whatever small model application you have in store, telemetry capable too!

FrSky presents the Xact 5701A servo, ready for any F3K, DLG or any other application where you need an ultra light, ultra compact, ultra thin yet high torque servo.

Inside the 6mm thick CNC machined Aluminum case is a set of all metal gears, spun by a coreless motor for quicker response and riding on ball bearings while a Hall Effect sensor keeps track of position. It is able to run on 3.5 to 8.4V, with exceptional torque and speed across the board, especially at higher voltages.

But that's not all, FrSky has incorporated telemetry sensors built right into the servo! They work with any FrSky F-Port 2.0 capable receiver and measure real time current draw and input voltage. You can also configure range of motion, direction and more via your radio's LUA script and perform firmware updates through your radio's SmartPort.

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