Portable Smart Ultrasonic Pest and Mosquito Repeller Keychain includes the following features :

• Emits automated, shifting ultrasonic waves ranging between 34KHz and 70KHz
• Rated voltage: 5V
• Rated power: 0.5W
• Chemical-free and radiation-free solution
• Whisper-quiet operation delivers powerful pest deterrence without generating any human-audible noise or annoying electromagnetic interference
• Equipped with a built-in 90 mAh li-polymer battery. It charges fully in just one hour via a universal type-c port (charging cable included)
• Battery life: 130 hours
• Features a heavy-duty metallic split ring that clips onto backpacks, belt loops, pet collars, or travel luggage

Material :

• ABS housing

Size closed :

• Diameter of 4.5 cm