Specification: Material: ABS  Model: PS-2018 / XL-020 / RS-20 / A04 (Optional) PS-2018: Color: White / Black (Optional) Size: 22 * 14.5cm / 8.7 * 5.7in (H * D) Applicable Area: 20-50㎡ Gross Weight: 544g / 19.2oz   XL-020: Color: White / Black (Optional) Voltage: 5V Power: 3W Frequency: 50HZ Size: 18 * 12cm / 7.1 * 4.7in (H * D) Applicable Area: 60㎡ Gross Weight: 380g / 13.4oz Package Size: 13 * 13 * 19.5cm / 5.1 * 5.1 * 7.7in   RS-20: Color: White Voltage: 5V Power: 5W Powered by: USB rechargeable battery (included) Charging Time: 6h Duration: 12h Frequency: 50HZ Size: 18.5 * 10cm / 7.3 * 3.9in (H * D) Applicable Area: 20-50㎡ Package Size: 11.5 * 11.5 * 19.5cm / 4.5 * 4.5 * 7.7in A04: Color: White / Black (Optional) Voltage: 5V Power: 3W Size: 18.5 * 11.5cm / 7.3 * 4.5in (H * D) Applicable Area: 20-50㎡ Net Weight: 288g / 10.2oz Gross Weight: 390g / 13.8oz Package List: 1 * Mosquito Killer Lamp 1 * USB Cable   Note: Please keep it away from water or other liquid to avoid electric shock or causing a fire. Use it on a dry, stable, flat and horizontal surface. Due to hand measure, the size may have 1-2 cm error. Due to Different Monitor, the color may have difference. The light draws the mosquitoes near the fan which creates a suction that sucks them into the base, and then kill the mosquitoes by air drying. We suggest using the lamp every 3 - 5 days at best. Each lamp comes with a USB cable to work with any device that has a USB port. The power plug is not included in the package since it varies according to different countries.