How does this compare to the spm4651t in terms of range and effectiveness? confused whether the integrated antenna helps or hurts functionality

I am not a fan of the antenna free receivers and I have not had any experience with this particular model. I did put it in a Habu 32X but swapped it out before I actually got to field test it. I added 2 additional remote receivers during the install for redundancy purposes because I didn't want to take any chances. So I guess the answer to your question is I don't know for sure but I will try it in a foamy before I put it in a high dollar aircraft.

Linking to another transmitter for training? purposes

I have not used the SPM9747 for that purpose (I've only used it as an extra receiver to improve RF diversity). I'm aware that this remote receiver can be installed in a lower-end transmitter like the Spektrum DXS. According to the DXS manual, this should allow you create an instructor - student setup with another Spektrum transmitter for training purposes.

Is this compatible with ds4s transmitter?

The DX4S transmitter is a Surface transmitter, and the SRXL2 Remote Receiver is for Air. So, no.

Is this a good choice to use with the Aura 8?

I use it with an Aura 8 but it requires an adapter cable that isn't included. It available from Flex Innovations...

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TRUSTED BRAND BACKING - Crafted by Horizon Hobby, a leader in RC innovation, ensuring quality and cutting-edge tech.
FEATHERLIGHT PRECISION - At just 22.68 grams, this receiver keeps your setup agile without compromising durability.
SPACE SAVVY COMPACTNESS - Sleek dimensions ensure easy integration into any remote system without bulk.
PLUG AND PLAY SIMPLICITY - No assembly or batteries needed—get straight to commanding your device with zero hassle.
SEAMLESS MULTI BAND CONNECTIVITY - Experience ultra-reliable 4-band DSMX SRXL2 signal for flawless remote control performance.

The Spektrum DSMX SRXL2 Remote Receiver is a compact, lightweight, and battery-free receiver featuring advanced 4-band DSMX SRXL2 technology. Designed by Horizon Hobby, it offers seamless, reliable connectivity for professional-grade remote control applications, making it an essential upgrade for enthusiasts seeking precision and ease of use.

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Product Dimensions	20.32 x 10.16 x 1.27 cm; 22.68 g
Item model number	SPM9747
Educational Objective(s)	Numeracy & Spacial Awareness
Number of pieces	1
Assembly Required	No
Batteries Required?	No
Batteries included?	No
tech_spec_battery_description_toys	No batteries required
Material Type(s)	Plastic
Remote Control Included?	No
Radio Control Number of Bands	4
Colour	Multi-coloured
ASIN	B07XZ9D8TK

SpektrumDSMX SRXL2 Remote Receiver

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