Creative and concise design, make it an interesting decoration Noiceless and make mist for whole night, provide contiuous moisture and relax your mood. Convenient and easy to use, space-saving and portable, can be used anywhere and any anytime. A meaningful gift to family, friends, colleagues or business partners. Name:Humidifier Driver Board type:atomization module Power:1.5-2W Voltage:DC 5V Current:300mA Spray amount:30-40ml/h Frequency:110KHz Steel sheet diameter:About 16 mm Silicone ring outer diameter:About 20 mm Noise:greater than equal36DB Applicable place:Office, Car, Home, Hotel Occasion:Working, Driving, Yoga, Reading, Sleeping, Traveling, SPA and so on. Quantity:1Pcs/5Pcs Colour:Green Material:PCB+plastic+Metal Size:34.8x18.6x13mm Package Contents: 1 * Atomization driver board 1 * Atomizer tablet 1 * Cotton swab 1 * holders / 5 * Atomization driver board 5 * Atomizer tablet 5 * Cotton swab 5 * holders 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.