So, instead of using ultrasound, radio waves are used as they travel at 300,000,000 m/s. It works in the same way as sonar but with radio waves in place of ultrasound. A short pulse of radio waves ...

Several companies make these, Traeger-owned Meater being one example, but existing products ... the RFX Meat uses radio technology to transmit data rather than Bluetooth. The company explains ...