THERMACELL MODEL E55X / PW0721 - BLACK. SCIENTIFICALLY PROVEN MOSQUITO PROTECTION: Thermacell is tested and proven to repel mosquitoes from a 20FT zone. TSA compliant (Carry-on only). EASY TO USE, NO SPRAY NEEDED: This on-demand mosquito repellent outdoor patio solution starts heating with the push of a button, reaching max protection in 15 minutes.