Wide application: This humidifier control board is suitable for DIY kits and a range of atomizing devices, including USB humidifiers, perfume atomizers, and aromatherapy machines, offering versatile humidity enhancement solutions for multiple environments. DIY kit: Package includes 1 humidifier control board module, 4 atomizers, 4 cotton swabs, and 1 4# bracket, providing all components for easy assembly and immediate use in your custom projects. Fine spray performance: Features 4 atomizer plates with 800 ultradense spray apertures producing 45 micrometers ultrafine mist particles that won't wet surfaces below, maintaining dry surroundings while effectively increasing humidity levels. Efficient drive circuit: Operating at 5 V driving voltage with 2 W rated power, this control board delivers stable waveform performance with low impedance and conversion efficiency for consistent atomization in various applications. Use scenarios: Build a USB powered humidifier or aroma diffuser for home or office. Integrate into perfume atomizers or aromatherapy machines requiring fine mist with minimal surface dampening. Implement in compact environmental control projects such as small cabinets, incubators, or terrariums that require humidity increase with minimal wetting.