This mosquito repeller is producing high frequency noise (a high pitched beeeeeeeeeepppppppp) to scare mosquitos away. Does it work? I still have to make sure it works by going to a mosquito infested area 🙂

mosquito repellent device with solar charger.

back part of the mosquito repellent device
Inside is the Printed Circuit Board (PCB), the speaker (the round thingy)
The solar cell charges the small battery.
The battery is dead but it is a 40BVH rechargeable battery (1.2V, 40mah)