Portable anti-mosquito device with ultrasound transparent watch type PM-623, Perfect Medical

Portable ultrasonic mosquito repeller, black, PM623N

This device repels female mosquitoes, responsible for bites, by emitting a continuous high-frequency sound.

It can be worn on the wrist, on the ankle, on clothing.

Way of ussage:
Remove the battery seal of the device, then insert the device into the rubber case, so that the emission grill of the device is on the right

the casing opening to the outside. Press and hold the button for at least 3 seconds to turn on the device. Press the button again to adjust the volume (three intensity levels).
The blue light lights up between 1 and 3 times to indicate the selected volume. To turn off the device, press and hold the button for at least 3 seconds. Lithium battery included (lifetime 1000 hours). Range of action 3m.

Careful:
Do not block the sound emission path, for example by placing the device in your pocket. Do not place the device on wet surfaces. Considering the small size of the device, assembly is done by an adult