4PCS 5V USB Humidifier Atomization Disc Kit with Circuit Board and Spray Module Professional Atomization Module for DIY Home Experiments Incubators Experimental Equipment Compatible

["Smart Spray Modes：Continuous Mode: 1st press activates LED-lit constant spray with 4-hour auto-shutdown；Intermittent Mode: 2nd press initiates 10s spray/5s pause cycles (LED flashing) with 12-hour auto-shutdown；3rd press powers off.","Precision Driver Board：DC5V/300mA input with 1.5-2W power efficiency；FR-4 fiberglass PCB (1.2mm thickness, 34.8×18.6×13mm compact size)，7.3g lightweight design for DIY integration.","High-Performance Atomizer：108-110kHz resonance frequency with 4-5μm micron apertures 1100 ultra-dense microholes on 304 stainless steel (Ø16mm active area)，Piezoelectric ceramic ring (Ø20×3.5mm) with 100mm PH2.0 terminals (1.9g total weight).","Other features：Switch bypass: Solder both contact pads for permanent spray (disables auto-shutdown)；Direct power connection: Solder ± terminals for external 5V supply (non-USB applications).","Security protection：Waterproof encapsulation protects solder joints from humidity；Silver-plated terminals prevent oxidation corrosion."]