Feature: 5V USB driver board. Low driving voltage, low power, low impedance, stable waveform, high conversion efficiency. Round ring plate, middle spray, 5um ultra-fine spray aperture, 740 ultra-dense spray holes. Strong versatility, large fog output, stable performance, and the chip has an automatic timer shutdown function. Note: This product is only suitable for USB 5V direct current, mobile phone Android line interface, and not suitable for 220V alternating current from household sockets. Parameter: Net diameter of atomized steel sheet: 16mm Outer diameter of silicone ring: 20mm Wire length: 8cm Product voltage: DV 5V Current: 300mA Power: 2W Frequency: 108KHz Number of holes: 1000 Aperture: 5um Driver board size: 46.3x18.5x1.0mm Material: PCB+plastic+metal colour: green Package Contents: 2 x Atomization driver board 2 x Atomizer tablet Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.