Our most advanced repellent system ever, the ThermaCELL Rechargeable Mosquito Repeller keeps mosquitoes away, without spray. Within minutes, the system heats and activates our scent-free, invisible repellent -- protecting outdoor spaces from mosquitoes. The repeller been evaluated by the EPA for safety and effectiveness and provides a 20-foot zone of protection against mosquitoes -- our biggest zone size ever by 80%. Rechargeable and long-lasting, this mosquito repeller is incredibly effective and is environmentally friendly. Its effectiveness is unmatched by candles or torches.