Seen these at 2 stores Prescot Extra & Edge Hill Metro Liverpool both stores had about 7 or so, the Prescot store SEL showed yellow label £6 the other store was showing £19.97 but had it scanned showed £6, I never bought any as dont need one.
The Universal Bluetooth® car speaker clips onto your sun visor and enables you to take calls simply and safely. This hands-free car kit has an unlimited talk and standby time when connected to a cigarette lighter power source. The Bluetooth® car speaker comes in a black plug and play design, and features digital sound enhancement. The speaker comes with a one-touch pairing button, last number redial, answer/end call button and has an opening range of 32 feet. The Bluetooth® speaker is suitable for any vehicle and can pair with up to 7 handsets.
More info available from deal link for Tesco Direct but that's showing full price this is an In-store deal only!