Circuit Board Atomizer: 5V USB mist maker driver board and atomizing plate kit for producing ultrafine 5um mist, featuring 740 density spray holes and oxidized silvercoated components for longlasting performance. Atomizer Board Module: Round atomizer board with a circular steel ring design and middle spray pattern to ensure stable waveform output and conversion efficiency at low power consumption of just 2W. Purifier Circuit Board: Compact size of 46*20*17mm/.81*0.79*0.67 with 8cm wire length, fits general humidifier enclosures and DIY mist projects that require a quick installation. Humidifier Driver Board: Uses environmentally friendly electronic components and includes a silicone ring with outer diameter of 20mm to prevent water leakage during travel or in smallspace applications. Use scenarios Quickinstall DIY mist projects: or upgrade misting components in compact humidifiers or custom misting devices that require reliable, lowpower operation. Portable diffusers and travel humidifiers: the silicone ring helps seal against leaks in small enclosures, supporting reliable operation on the go. Smallspace horticultural or laboratory misting: suitable for targeted humidification in tight spaces where stable output and compact form factor are important.