hey fellas , got a Futaba 4px , using a r304sb .Looking to use the telemetry function , thought receiver had telemetry built in but was told that i need an adaptor for this to happen , is this true? if so what do i need ?

Thanks Mark

Futaba has an SBUS connector, this is a kind of a network system.

https://www.futabarc.com/sbus/

You can connect one item but with hubs you can connect more. If you just want to connect 2 sensors, just get a simple servo Y cable. All hubs are just simpel parallel connectors.