It consists of a 17 m wooden telegraph pole standing on a hillside which is itself about 160 m above sea level.

Llansawel transmitter is classed as an indirect off-air relay of Carmel.

After the switchover process, analogue channels had ceased broadcasting permanently and the Freeview digital TV services were radiated at an ERP of 2 W each.

[1] Llansawel entered service in late spring/early summer 1986,[2] and (being in Wales) transmitted the S4C variant of Channel 4.

The UK's digital switchover commenced at Carmel (and therefore at Llansawel and all its other relays) on 26 August 2009.