ARS 90 DAYS CORDLESS SET - Ars Cordless Electric Mosquito Repeller is under license and technology from Earth Chemical (Japan) Co.,Ltd. long lasting for 30 days (240 hours) if used for 8 hours a day. Convenient - Compact, Cordless, Easy to use. Clean - No stain during usage. Smokeless - Applicable for any room in your home and adding extra apparatus according to suitability. Product Benefit : To repel mosquitoes Ars Nomat Electric Mosquito Repeller is easy to use, smokeless. Suitable for any rooms such as living room, kitchen and etc. and adding extra apparatus according to suitability. Recommended to use with Ars Liquid Refill only. 1. On-Off switch 2. Indicating light for working status 3. Easy notice when refill is used up 4. Rotatable plug