Features: This product is designed to be safe and environmentally friendly, with no electromagnetic wave radiation or noise pollution. It is primarily intended for repelling mosquitoes and may also help deter pests such as cockroaches, flies, and rodents. The outer shell is constructed from ABS flame-retardant material, which is durable and environmentally conscious. It emits ultra waves that are non-toxic and odorless, designed to have no adverse effects on humans or household pets. Utilizing a physical repellent method, it aims to reduce reliance on chemical solutions, helping to minimize potential environmental impact and exposure risks. Specifications: Condition: New Material: ABS/Plastic casing Color: White, Black (Optional) Size: Approx. 5 x 1.35 cm (2.0 x 0.5 in) (Diameter x Thickness) USB Charging: DC 5V 1-2A Working Voltage: 3.7V Static Working Current: Less than 1.5 μA Dynamic Working Current: Less than 1.8 mA Working Frequency: 13-95 kHz (automatic cyclic scanning) Power Supply: Built-in polymer lithium battery 100 mAh, 3.7V (included) Effective Range: 10-70 square meters Package List: 1 x Insect Repeller 1 x Instruction Manual 1 x Data Cable 1 x Carabiner Note: This device can be powered via USB adapter, computer, or portable power bank. If not in use for an extended period, disconnect the power source to preserve product longevity. For stable operation, use a 5V-2A branded charger or compatible power bank. Please note that new and old versions may be shipped randomly; confirm acceptance before ordering.