Ultrasonic Nebulizer UN-20 - by Omega Nice and compact design Operation smoothly and quietly Complete Ultrasonic Nebulizer Kit. Technical specification: Power Voltage: AC220V±22V Ultrasonic Frequency: 1.7MHz±0.17MHz Continuous Working time: ≥4h Consumption power: ≤40W Max medication capacity for small cup: 150ml Max medication capacity for big cup: 350mL Max nebulizing rate: ≥ 4mL/min Model: UN-20 Made in Singapore