Tech Guru Trevor Long joins Jo McManus every Tuesday to talk the latest in technology and answer questions.

Today he spoke about:

• First up, "ears on" with the new DYSON product - HEADPHONES that also purify the air you breathe - crazy stuff!
• BMW took a car that changes colours and patters and a new concept for HEAD UP DISPLAYs to the world's biggest tech show
• Want to play piano? The Light strip will teach you - but it's NOT CHEAP!