I am selling this because I accidentally bought two. I opened it to check the operation. Product Specifications: Size: Approximately 37 x 55 x 14mm Weight: Approximately 11g Frequency: 34 HZ - 70 KHZ Charging: Type-C 5 V/1 A Safe and Reliable Non-Chemical Solution Our ultrasonic pest repeller uses no chemicals, making it safe for use in homes with children and pets. It utilizes ultrasonic waves to effectively repel pests such as mosquitoes, mites, mice, cockroaches, ants, fleas, and spiders. High Efficiency & Energy Saving Design This ultrasonic pest repeller employs the latest ultrasonic technology and operates with a low power consumption of only 1W. It has a built-in 90mAh high-capacity polymer battery, which charges in just 30 minutes and allows for up to 72 hours of continuous use on a single full charge. 3-Stage Adjustment Function You can freely switch between three ultrasonic modes: outdoor, indoor, and silent mode, according to the environment and your needs. Operation is very simple, with all operations completed with a single button. It can be used comfortably in nature or at home and adapts to various situations. Type-C Charging & Easy Operation It uses the latest Type-C charging port, which is compatible with many chargers. Charging is quick and easy. The red LED lights up during charging, and the green LED lights up when charging is complete.