STK SP300

The SP300 is an alternative choice, as it doesn’t go in your ear or on your sun visor. It comes with a suction cup mount for your windscreen, and on the back is a solar panel to charge it up. But it costs £10 more than the TX500, has tiny, confusing buttons and took five attempts to pair to our phone. Our caller said we were quiet and that he could hear his own voice, too.