Plenty of smart devices all around us are capable of recording audio. If you are planning to have confidential conversations at your place, you may want to invest in a decent privacy protector. The HARP Mini is a smart microphone jammer that keeps your connected devices from recording without your permission.
The HARP Mini generates an ultrasonic noise that you can’t hear but will keep a smartphone from recording clear audio. It has a discreet design and can be activated with the touch of a button or through its mobile app.[where to get it]