Went into Comet yesterday to pick up another deal I found here and saw this, didn't bother with it when I bought my HT-X30R as it was £99, nearly as much as I paid for the main unit, but for £13.99 I'm well chuffed :-D
Not available online, in clearance so may be limited stock but there was boxed stock in the warehouse and a display model at my local store.
NB: Shelf-edge label £13.99 but the price when scanned was £19.99, the extra £6 off was though a manual code (clearance 30%) put in by staff.
This product eliminates the need to run wires to the back of your room as it's a wireless rear channel amplifier. It receives the rear-channel audio signals wirelessly from your system's main unit. All you have to do is connect your two (current) rear speakers to the unit and you can enjoy full surround sound - without the wires running from your system's main unit to the back of the room. (10m wireless range)
Compatible only with the following Samsung Home Cinema Systems:- HT-THX22, HT-THX25, HT-Q20, HT-XQ100, HT-TX35R, HT-X250R, HT-TXQ120R, HT-X30R