Although it has modest specs, the 5-inch LG K7i (LGX230I) debuts in India as "the world's first phone with Mosquito Away technology." This handset comes with a special cover with an ultrasound emitter and a special stand to keep it in place when acting as a mosquito repellent device.
https://www.notebookcheck.net/LG-K7i-Mosquito-Away-Android-smartphone-hits-India.252310.0.html