Switchable mosquito expelling/killing device including a box body having a clip for hanging the box body on a user's body. The box body is disposed with a pushing block, an electric mosquito incense mat insertion hole, gas releasing slots and a switch. An oscillating circuit and a heater fixing seat,...http://www.google.sh/patents/US6293044?utm_source=gb-gplus-sharePatent US6293044 - Switchable mosquito expelling/killing device
